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Episode 1:  How temperature effects sea turtle sex | Water as Habitat
 
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Boris Tezak, Integrative Biology Ph.D. student at Florida Atlantic University investigates the effects of climate change on sea turtle gender. SUBSCRIBE: http://bit.ly/1KAhvQ6 Series created and produced by Ashley Luke, COSEE Florida's Digital Media Coordinator. Funding for Water as Habitat (WaH) is provided by a National Science Foundation grant. WaH is a project of the Ocean Research & Conservation Association, Inc. (ORCA), which is supported by COSEE Florida's partnership with Indian River State College, Smithsonian Marine Station at Fort Pierce, and Florida Institute of Technology. Find out more information on the series and stay tuned for more episodes at: http://www.coseeflorida.org/water-as-habitat.html Facebook: COSEE Florida Twitter: @COSEEFlorida Instagram: coseeflorida
Views: 4196 COSEE Florida
Sex Determination: More Complicated Than You Thought
 
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From something as small and complex as a chromosome to something as seemingly simple as the weather, sex determination systems vary significantly across the animal kingdom. Biologist and teacher Aaron Reedy shows us the amazing differences between species when it comes to determination of gender. Lesson by Aaron Reedy, animation by BuzzCo (http://buzzzco.com).
Views: 2748412 TED-Ed
How Is Sex Determined In Turtles?
 
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What type of mechanism do turtles use to determine what gender their offspring will be?
Views: 2473 BioBIast
Temperature-dependent sex determination - Video Learning - WizScience.com
 
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"Temperature-dependent sex determination" is a type of environmental sex determination in which the temperatures experienced during embryonic development determine the sex of the offspring. It is most prevalent and common among amniote vertebrates that are classified under the reptile class. TSD differs from the chromosomal sex-determination systems common among vertebrates. It is a type of environmental sex determination ; in other ESD systems, some factors such as population determine the sex of organisms . TSD was also thought to occur in some megapodes, such as the Australian brushturkey; however, their offspring sex ratios appear to result from temperature-dependent embryo mortality rather than from TSD. The eggs are affected by the temperature at which they are incubated during the middle one-third of embryonic development. This critical period of incubation is known as the thermosensitive period . The specific time of sex-commitment is known due to several authors resolving histological chronology of sex differentiation in the gonads of turtles with TSD. The thermosensitive, or temperature-sensitive, period is the point during development at which sex determination occurs in temperature-dependent sex determination systems, such as those present in alligators and turtles. Occurring during the middle third of incubation, the TSP lasts for 7–15 days, species-dependent. The temperature must be maintained during this time for a certain sex to be determined; often the differences between temperatures required to produce each sex are very slight and during the TSP, sex is susceptible to change with temperature. After this period, however, sex cannot be reversed . Wiz Science™ is "the" learning channel for children and all ages. SUBSCRIBE TODAY Disclaimer: This video is for your information only. The author or publisher does not guarantee the accuracy of the content presented in this video. USE AT YOUR OWN RISK. Background Music: "The Place Inside" by Silent Partner (royalty-free) from YouTube Audio Library. This video uses material/images from https://en.wikipedia.org/wiki/Temperature-dependent+sex+determination, which is released under Creative Commons Attribution-Share-Alike License 3.0 http://creativecommons.org/licenses/by-sa/3.0/ . This video is licensed under Creative Commons Attribution-Share-Alike License 3.0 http://creativecommons.org/licenses/by-sa/3.0/ . To reuse/adapt the content in your own work, you must comply with the license terms.
Views: 2016 Wiz Science™
Environmental vs Genotypic Sex Determination | Nicole Valenzuela | EvSex
 
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Why do organisms vary so remarkably in the ways they produce males and females? Sexually-reproducing organisms employ diverse mechanisms to produce males and females, ranging from systems under strict genetic control (GSD) [such as highly dimorphic or undifferentiated sex chromosomes (XY, ZW)], to systems under strict environmental control dependent [such as those dependent on temperature (TSD) as is commonly found in reptiles and fish], or both. The evolution of this diversity has defied scientific explanation and to answer this question it is essential that we understand its ecological context, mechanics, and evolutionary patterns. These talks will showcase research conducted to illuminate the molecular basis of TSD in turtles and how it differs from GSD, as well as research on the causes and consequences of chromosome evolution. This includes studies of the genetic and epigenetic regulation of turtle sexual development, the evolution of sex chromosomes and the genes they contain, with further emphasis during the public lecture on the evolution of turtle genome organization into chromosomes and its association with climate change, and the role of life history traits on the evolution of sex determination and diversification.
Sex Determination in Sea Turtles
 
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Video Presentation Science Communication Untold hours of pain and suffering all condensed into 3 short minutes.
Views: 1032 Clement Poh
Pollution Is Changing The Sex Of These Animals!
 
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What if our gender was determined by external temperature at a certain point in fetal development? For these animals, this is the reality! How Does Asexual Reproduction Work? - http://bit.ly/28NW9Cr Sign Up For The Seeker Newsletter Here - http://bit.ly/1UO1PxI Read More: 'Third Sex' Lizards Could Outcompete Their Normal Female Cousins http://www.sciencemag.org/news/2016/06/third-sex-lizards-could-outcompete-their-normal-female-cousins "Sex is never simple-even among lizards. Unlike mammals, the sex of central bearded dragons, large lizards found in eastern Australia, is determined by their chromosomes and the environment. If the eggs are incubated in high temperatures, male embryos turn into females." Fish With Temperature-Dependent Sex Determination: How Common Are They? https://www.sciencedaily.com/releases/2008/07/080729234256.htm "In vertebrates with separate sexes, sex determination can be genotypic or temperature-dependent (TSD). TSD is very common in reptiles, where the ambient temperature during sensitive periods of early development irreversibly determines whether an individual will be male or female. But just how common is this phenomenon in fish?" Climate Change And Temperature-Dependent Sex Determination In Reptiles http://www.ncbi.nlm.nih.gov/pmc/articles/PMC44426/ "Despite increasing concern over the possible impact of global temperature change, there is little empirical evidence of direct temperature effects on biotic interactions in natural systems. Clear assessment of the ecological and evolutionary impact of changing climatic temperature requires a natural system in which populations exhibit a direct unambiguous fitness response to thermal fluctuation." ____________________ DNews is dedicated to satisfying your curiosity and to bringing you mind-bending stories & perspectives you won't find anywhere else! New videos twice daily. Watch More DNews on Seeker http://www.seeker.com/show/dnews/ Subscribe now! http://www.youtube.com/subscription_center?add_user=dnewschannel DNews on Twitter http://twitter.com/dnews Trace Dominguez on Twitter https://twitter.com/tracedominguez DNews on Facebook https://facebook.com/DiscoveryNews DNews on Google+ http://gplus.to/dnews Discovery News http://discoverynews.com Download the Seeker Daily App: http://testu.be/1ndmmMq Sign Up For The Seeker Newsletter Here: http://bit.ly/1UO1PxI
Views: 73698 Seeker
SAVE THE TURTLE: early sex determination
 
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https://www.indiegogo.com/projects/start-kit-for-early-determination-of-turtle-s-sex-innovation#/ A Crowdfunding campaign for the development of project KIT "sTart": an industrial kit for early determination of turtle's sex. We can save endangered species by knowing their sex from birth with a non-invasive and fast kit. Please, support our scientific project! Thanks, Staff Darwinlab for planet
Views: 143 darwinlab darwinlab
How to decipher the sex-change code: in bearded dragons could help you survive.
 
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How to decipher the sex-change code: in bearded dragons could help you survive. Australian scientists claim to have deciphered the code that explains why reptiles change sex under the stress of extreme temperatures. The proposed model could also help manage biodiversity as reptiles are under pressure from climate change. The Australian lizard dragon has sex chromosomes similar to birds that determine sex at normal temperatures. However, at high temperatures, embryos with male sex chromosomes reverse sex and hatch as women. Scientists are concerned that rising temperatures could affect the sex ratio of species such as the bearded dragon. Survival in climate change is reduced to: moving, adapting or dying. It has long been known that extreme temperatures can trigger sex change in reptiles. In bearded dragons sexual inversion begins to occur at low percentages in male eggs when they are incubated at 32 degrees. At 36 degrees we see sexual reversion in about 100 percent of male offspring. The bearded dragon distribution extends into the desert regions of Australia, so the 36 degree soil temperature is entirely feasible. The dragons usually bury their eggs in the ground about 10 centimeters below the ground: it would be a bit like an oven. The reproduction takes place between September and February so through the summer months is when everything is happening. In turtles, there is concern that rising sea temperatures could push to become populations of all women, if species are not able to adapt the sex change in crocodiles has been recorded when eggs in incubation are Too hot or too cold, but scientists do not know what causes these changes. #Beardeddragon #regions #eggs #scientists #survival #temperatures #biodiversity #climatechange #summer #ymasciencia
Views: 221 Science and more
Sexual Evolution: From X to Y
 
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Howard Hughes Medical Institute Holiday Lectures on Science 2001 The Meaning of Sex Genes & Gender Lecture 4: Sexual Evolution: From X to Y By David C. Page M. D.
Views: 1374 FloatingJetsam
Sex Determination
 
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2nd video Dr. William Bass
Views: 2594 Peter Maxwell
Environmental determination of sex
 
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Useful for CBSE, ICSE, NCERT & International Students Grade : 10 Subject :Biology Lesson : HEREDITY AND EVOLUTION Topic: ENVIRONMENTAL DETERMINATION OF SEX While the sex of most snakes and most lizards is determined by sex chromosomes at the time of fertilization, the sex of most turtles and all species of crocodilians is determined by the environment after fertilization. Visit www.oztern.com to find personalized test preparation solutions for Pre Medical - AIPMT, AIIMS, JIPMER, State, Pre Engineering - IIT JEE, JEE MAIN, BITSAT, State and Foundations - Class 6 to 10.
Views: 848 CBSE
TEMPERATURE DEPENDENT SEX DETERMINATION
 
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Description
Views: 1188 Walter Jahn
Temperature dependent vs chromosome control sex determination | James Bull
 
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James Bull is the Johann Friedrich Miescher Regents Professor in Molecular Biology at the University of Texas, Austin. Evolutionary genetics from the molecular to the phenotypic levels comprises the bulk of Dr. Bull's research. Specific topics include the evolution of engineered genomes, microbial drug resistance, and adaptation addressed empirically and theoretically. Experimental systems are developed in which evolution occurs over short time periods in the laboratory; the evolved lines are then analyzed at the molecular genetic level so that the course of evolution is known with certainty.
3.6 EN: Sex determination
 
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Help us in helping more students like you by completing this short survey : http://survey.edunation.my/ -~-~~-~~~-~~-~- SPM Science Form 4 chapter 3.6 Sex determination Done. By: Cheeng Hong Tang ... -------------------------------- For more learning videos and exercises: http://www.edunation.my Support EduNation: http://supportus.edunation.my … 100% of donation and profits will be used to make education free for everyone, everywhere! Like us on Facebook: https://www.facebook.com/EduNationMalaysia Follow us on Twitter: https://www.twitter.com/edunationmal --------------------------------
Bisphenol A sex-reverses behavior in turtles
 
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Bisphenol A and other chemicals in the environment can alter the ability of turtles to navigate their environment. These endocrine disruptors act like estrogen in animals and humans. For turtles — who depend on temperature rather than sex chromosomes to determine gender — that can skew gender ratios. New research also shows BPA changes behavior, in this case making male turtles act more like females who find food faster in test mazes. Scientist Cheryl Rosenfeld at the University of Missouri Bond Life Sciences Center say this sex-reversed behavior may indicate a deeper physical and chemical change in how the brain works on BPA. Her future research will focus on studying these alterations that occur in turtle's brains. Special thanks to MU graduate Lindsey Manshack for granting access to experiments in the Rosenfeld lab. Music is licensed under Creative Commons. Composer: P. I. Tchaikovsky: Dance of the Sugar Plum Fairy by Kevin MacLeod
IMMORTAL Organisms Around The World!
 
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Check out these immortal organisms around the world! These animals know all about immortality! Subscribe For New Videos! http://goo.gl/UIzLeB Watch our "Most AMAZING Spiders In The World!" video here: https://youtu.be/AOYsD2zQPe4 Watch our "Most AMAZING Hotel Rooms!" video here: https://youtu.be/Iff08KpP2vY Watch our "AMAZING Animal Superpowers!" video here: https://youtu.be/RWrJtOVN_y4
Views: 894375 Origins Explained
Sex Reversal Mystery Explained
 
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Sex Reversal Mystery Explained:transcriptome, splicing , sex determination, cell & molecular biology and alternative splicing. RNA sequencing:https://youtu.be/lW4-GO21waA Sex Reversal Mystery Explained? A proposed mechanism for how bearded dragons with male chromosomes hatch as females at high temperatures The sex of Australian central bearded dragons (Pogona vitticeps) is normally determined by chromosomes—lizards with two Z chromosomes develop as males, while ZW embryos become females—but at high incubation temperatures, both ZZ and ZW individuals are born as females. Now, researchers think they may have discovered why. A group of researchers in Australia sequenced the transcriptomes of various tissues in normal ZW females, normal ZZ males, and so-called sex-reversed ZZ females, and found that two genes, JARID2 and JMJD3 (aka Jumonji genes), retained their introns in sex-reversed females. This led to shorter proteins that the authors argue could explain the female development. They published their results yesterday (June 14) in Science Advances. “We aren’t sure what introns like [those retained in] the Jumonji genes are for: it seems they help switch genes on and off at the right time,” lead author Ira Deveson of the Garvan Institute of Medical Research in Sydney tells The Sydney Morning Herald. Mining data from other studies, Deveson and colleagues also found evidence for similar intron retention in other species with temperature-dependent sex determination, alligators and turtles. As climate change continues to result in higher average temperatures around the globe, some researchers and conservationists have raised concerns about the fate of such organisms, as the sex ratios of the populations shift one way or the other. “This elegant research . . . [shows] the same mechanism is found across a wide range of reptile types,” Rick Shine, an evolutionary biologist at the University of Sydney who was not involved in the research, tells The Sydney Morning Herald. “The authors’ results may one day enable us to manipulate sex ratios of endangered species to assist in conservation.” According to the scientist. Thank you for watching! Don't forget to like this video, and subscribe for the next video. #researchsciences
Views: 150 21 News
High Temperatures Turning Australian Male Reptiles To Females
 
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Researchers in Australia have for the first time found evidence of temperature-induced sex changes among lizards in the wild. Researchers in Australia have for the first time found evidence of temperature-induced sex changes among lizards in the wild.  For most vertebrates sex is result of certain chromosome combinations, but for Australia’s bearded dragon lizard such matters aren’t so dependably determined.  Researchers have learned through controlled experiments that for the reptiles temperature can trump genes.  If it gets hot enough incubating babies slated to become males can emerge from their eggs as females.  That, of course, raises concerns about the fate of the lizards in a rapidly warming world, but until the recent discovery there was no proof such a transition was occurring in nature. Coming to realization that it is happening involved gathering 131 wild bearded dragons from throughout eastern Australia.  The subjects were then tested so their chromosomal combinations could be documented.  In the lizards the letters Z and W are used much in the way X and Y are in humans. ZZ is the male indicator and ZW the female one.  The team, however found 11 ZZ lizards that were, in fact, ladies.  There is a possibility the bearded dragons will adapt rather than die out, but researchers are working to gain greater clarity about how the animals respond to climate changes.
Views: 2359 GeoBeats News
Sex Determination In Different Organisms Tutorial
 
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Recorded with http://screencast-o-matic.com
Views: 512 Nada Badr
Climate Change, TSD, and Loggerhead turtles
 
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This video explains a little more about a topic in science that I am passionate about. Emily Breech Transcript: Temperature-dependent sex determination, also known as TSD, is a type of environmental sex determination in which the temperatures experienced during embryonic development determine the sex of the offspring. This is the starting point of the ultimate topic I want to cover today, which is climate change. As a biology major with a specialization in marine biology, this topic interests me very much. Climate change causes a rise in temperature, which is known, but some less common effects of it are variations in normal rain patterns and storms and rising CO2 levels. The biggest one is the rise in temperature, which is what I will be focusing on, but it is also important to know the other effects as well. So, on to temperature. The reason I want to focus on this is because of the first thing I mentioned: temperature-dependent sex determination, or TSD. This is because of an entire species of animals that could go extinct: reptiles. Many reptiles, and even some fish’s genders are determined by temperature during the embryonic development. With the rise in global temperatures, many reptiles, and more specifically loggerhead turtles, which are going extinct as we speak, many of them are born females. It is becoming more and more common for there to be only females in a nest rather than males because females incubate at a higher temperature than males. For loggerhead turtles, only about one in 2,500 to 7,000 sea turtles make it to adulthood. They typically produce about 105 eggs per nesting season and would have to nest for more than 10 nesting seasons over the span of 20 to 30 years just to replace one turtle. Without enough males, they will not be able to breed, and with the low numbers of turtles there are just by natural selection, in a few years there may be no more loggerhead turtles, and other species may begin dying off for the same reason. So, with this information and with my passion in my major, I do not want to be an ivory tower. I have the knowledge, but I also want to earn my degree to change the world and assist in preserving species such as the loggerhead turtles. Now that you have this information, will you help? Thank you for watching my video and I hope you enjoyed. Photo by Peter Schulz
Views: 327 DarKairiFan
Science, Sex Bias, and...Ruth Bader Ginsburg?
 
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Science has historically ignored females, whether they're insects, lab rats, or humans. Subscribe! http://bit.ly/1FkxVLb ‖ Twitter! https://twitter.com/gross_science ‖ Tumblr! http://grossscience.tumblr.com/ ↓Want more info?↓ NOVA Next article by Eben Bein: Medical Research Has a Sex Problem: http://to.pbs.org/29vPrlQ 2016 study using female genitalia to identify mantis species: http://bit.ly/29ullza 2011 study surveying the use of male and female animals in research papers published in 2009: http://bit.ly/1rsqCv5 2014 study debunking the myth that femal mice are more variable than male mice: http://bit.ly/299gCRm 2016 Washington Post piece about Ilomantis ginsburgae: http://wapo.st/22yfiLf 2015 Nature Neuroscience article on how female mice process pain differently from male mice: http://bit.ly/24UbwM1 2015 report on the number of women in clinical trials: http://1.usa.gov/1GDMLxo Public Law 103-43—Law requiring that woman and people of color be included in clinical trials: http://bit.ly/29wOciD NIH policy on the consideration of sex as a biological variable: http://bit.ly/29wOeac 2007 review article on how drugs affect sexes differently: http://bit.ly/24UbwM1 2014 news stories on sex bias from NPR, the Boston Globe, and Nature: http://n.pr/1PDzVya, http://bit.ly/1S7dtgR, http://go.nature.com/1XrQi90 A 2006 commentary on how sex bias negatively impacts women’s health: http://bit.ly/1YuWrjN -- Host, Producer, Animator, Editor Anna Rothschild Writer, Illustrator, Camera Sound Eben E. B. Bein Original Footage ©WGBH Educational Foundation 2016 Swing Club E Music Provided by APM IMAGES Images of Ilomantis ginsburgae and mantis genitalia Courtesy Sydney Brannoch U.S. Supreme Court Justices Pose for Group Photo/Ruth Bader Ginsburg © Getty Images/Mark Wilson Praying Mantis, Insect, Green Pixabay/fill Adult female Deroplatys desiccata photographed at Bristol Zoo in 2007 Wikimedia Commons/Adrian Pingstone Choeradodis sp. Hooded Mantis - Cayo District, Belize Flickr/Thomas Shahan Camouflage: Flower Mantis Hymenopus coronatus on Phalenopsis orchid Wikimedia Commons/Philipp Psurek Praying Mantis by clearlyambiguous Wikimedia Commons/Scott Robinson Sphodromantis viridis Wikimedia Commons/Mintz_I SFX Cockroaches Freesound/StateAardvark­ (used with permission from author) Squeak Pack/squeak_10 Freesound/Corsica_S Bubbles Popping Freesound/ch0cchi Insect Trill Freesound/metamorphmuses Swishes Freesound/Pogotron Wink Freesound/bennychico11 Royal ping Freesound/faston Poof of Smoke Freesound/planman Textmarkerpapier Freesound/hannagreen Pencil Freesound/faston Wasserflasche37 Freesound/schluppipuppie Marker Writing on Paper Freesound/ftpalad Slide whistle down fast 01 Freesound/joedeshon Slide whistle up 01 Freesound/joedeshon Produced by WGBH for PBS Digital Studios scishow nova
Views: 19860 Gross Science
Film Theory: Was SpongeBob ADOPTED?! (SpongeBob SquarePants)
 
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SUBSCRIBE for More Film Theories! ► http://bit.ly/1dI8VBH You'll Die Before this Spongebob Meme ► http://bit.ly/2C3IkhT Gravity Falls ISN’T OVER! ►► http://bit.ly/2l2P2dt SpongeBob SquarePants is quite the odd character. A yellow pant-wearing sponge with an unmistakable laugh. The lovable son of two… well… different looking parents? Are we EVEN sure those are his parents? There’s only one way to find out Loyal Theorists! Time to buckle down for some good old biology to solve this once and for all! MORE FILM THEORIES Santa’s LOST SON ►► http://bit.ly/2DyL2tV The Emoji Movie is ILLEGAL! ►► https://goo.gl/LsA7Pa Will MORTY KILL RICK?! ►► https://goo.gl/GBkFhi Is THOR Stronger Than THE HULK? ►► https://goo.gl/VDYAqc Is Eleven the Monster? | Stranger Things ► https://goo.gl/TuJsLU Don't Hug Me I'm Scared DECODED! ►► http://bit.ly/FTDHMIS Like the theme song and remix for this episode? Thanks to CARF! https://www.youtube.com/user/carfmobile SOCIAL MEDIA: Twitter: @MatPatGT Facebook: facebook.com/GameTheorists Instagram: instagram.com/matpatgt
Views: 8072641 The Film Theorists
Lizard sex switch
 
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A climate-induced change of male dragons into females occurring in the wild has been confirmed for the first time, according to University of Canberra research published on the cover of prestigious international journal Nature. Researchers from the University’s Institute of Applied Ecology studied Australian bearded dragons and have been able to show that the reptile’s sex determination process can switch rapidly from one determined by chromosomes to one determined by temperature.
Emotional Baby Turtle Release |  Costa Rica in One Week: The Ultimate Guide | Grace at the Barre
 
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A Research and Conservation Station, run by ASVOCR. The initiative conducts research of sea turtles, whilst also protecting their environment and facilitating population growth. In other words, we watched baby turtles being released into the sea and I felt like Sir David blooming Attenborough. SeaTurtle.org say: Watching a baby turtle (known as a "hatchling") struggle out of the nest and make its way to the water is an emotional experience. Everything from footprints to driftwood and crabs are obstacles, though this gauntlet is important for its survival. Birds, raccoons, and fish are just a few of the predators these vulnerable creatures face; some experts say only one out of a thousand will survive to adulthood under natural conditions. After an adult female sea turtle nests, she returns to the sea, leaving her nest and the eggs within it to develop on their own. The amount of time the egg takes to hatch varies among the different species and is influenced by environmental conditions such as the temperature of the sand. The hatchlings do not have sex chromosomes so their gender is determined by the temperature within the nest. Footage courtesy of my lovely G Adventures Tour Group. Muchos gracias! For more information about the sanctuary, visit: www.asvocr.org/english/playamontezuma/
Views: 13 Grace Owen
AGRI 305 - prep lecture chapter 4
 
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Table of Contents: 00:01 - Chapter 4 00:15 - Sex-linked traits 02:02 - Sex Determination 03:30 - Sex chromosomes vs. Autosomes 04:02 - 05:28 - Types of Sex Determination: 06:51 - Environmental Sex DeterminationCrepidula fornicata (slipper limpet) 07:38 -
Views: 90 Kasey DeAtley
160509 102
 
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00:00 Introduction to sex determination (part 2) 04:03 Goals 04:44 Temperature-dependent sex determination: temperature-sensitive enzymes 10:10 Human sex chromosome constitution 12:27 Human sex chromosome mutants: learning about sex determination in humans 17:00 Turner’s syndrome (XO) 17:59 Klinefelter’s Syndrome (XXY) 19:17 Cognitive issues with XO and XXY humans 21:25 XXY “supermales,” imprisonment and aggression? 30:56 Genetic influence on behavior: mitochondrial genotypes of seed beetles 39:27 Society and genetics: sex chromosomes and sexual identity 41:31 Conclusion
Views: 98 Joseph Ross
Mouth Swabs for Avian Sex Determination
 
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This video demonstrates the correct technique for taking a mouth swab for DNA sexing.
Views: 1719 Biobest Laboratories
Temperature and Sex Determination | James bull
 
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James Bull is the Johann Friedrich Miescher Regents Professor in Molecular Biology at the University of Texas, Austin. Evolutionary genetics from the molecular to the phenotypic levels comprises the bulk of Dr. Bull's research. Specific topics include the evolution of engineered genomes, microbial drug resistance, and adaptation addressed empirically and theoretically. Experimental systems are developed in which evolution occurs over short time periods in the laboratory; the evolved lines are then analyzed at the molecular genetic level so that the course of evolution is known with certainty.
Baby Sea Turtle In Lara Beach!  (Andreas Dimitriou)
 
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Watching a baby sea turtle (known as a "hatchling") struggle out of the nest and make its way to the water is an emotional experience. Everything from footprints to driftwood and crabs are obstacles, though this gauntlet is important for its survival. Birds, raccoons, and fish are just a few of the predators these vulnerable creatures face; some experts say only one out of a thousand will survive to adulthood under natural conditions. After an adult female sea turtle nests, she returns to the sea, leaving her nest and the eggs within it to develop on their own. The development time varies among different species and is influenced by environmental conditions such as the temperature of the sand. The developing hatchlings do not have sex chromosomes so their gender is determined by the temperature within the nest. https://goo.gl/O3JYgx https://goo.gl/eJql7q (Turtles) https://goo.gl/IYrLPA (Lara Beach Paphos) https://goo.gl/Ml4NgQ (Agios Georgios Pegeia) https://goo.gl/FkkS4w (Ammoui Beach - Lara Beach) https://goo.gl/NjzmUk (Lara Beach Beautiful sandy beach) https://goo.gl/qOo36m ( Babys SeeGulls)
Views: 360 Cyprus
151204 BIOL 102
 
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0:00 Goals 0:25 Introduction 1:02 Sex determination is the most fundamental developmental decision 4:11 What about animals that don't use genetics to dictate sex? 5:58 Robust sex determination is critical for fitness 7:02 Despite this, genetic sex determination doesn't work the same in all vertebrates 11:23 How humans determine sex 15:05 Historical perspective on how sex might be determined 17:16 Our three species to focus on: mammals, flies, worms 18:00 Biological definitions of sexes: seahorse as a case study 20:20 Defining sex means understanding how an organism decides to make sperm or eggs 20:50 Drosophila sex determination 21:41 How would a scientist decide whether it is # of X chromosomes, or presence/absence of the Y, that causes sex determination?
Views: 72 Joseph Ross
022 Sex determination
 
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Views: 468 Didattica Federico
10 Animals That Hold The Key To Immortality
 
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For centuries, scientists have debated the possibility of human immortality. But could the key to that breakthrough already exist within the animal kingdom? AllTime10s looks at our planet’s most likely creatures that could hold the secret to everlasting life. 10 Cute Animals That Could Destroy You - https://www.youtube.com/watch?v=SzvxLUPw7Bc&index=107&list=PL2AD0E13C187B43E7 Music = Bed Bugs by Bob Bradley / Matt Sanchez / Steve Dymond Click to Subscribe.. http://bit.ly/WTVC4x Check out the best of Alltime10s - https://www.youtube.com/playlist?list=PLec1lxRhYOzt2qqqnFBIpUm63wr5yhLF6 This was our list of 10 Animals That Hold The Key To Immortality. What did you think? Let us know in the comments below. Where else to find All Time 10s... Facebook: http://ow.ly/3FNFR Twitter: http://ow.ly/3FNMk
Views: 1586205 Alltime10s
DETERMINAÇÃO DO SEXO
 
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hey! nesta zazaula de biologia genética, ep. 15, sobre determinação do sexo, conversamos sobre determinação por cromossomos sexuais, cromatina sexual, haplodiplodismo e mais! e sabe que além dessa aula, tem muita mais zazarte por aí? vem conhecer nossas produções nos links abaixo ;) antes, avalie essa zazaula pelo link https://goo.gl/forms/KsdIcsuSWOUGI54J3 {links que prometi aqui em baixo!} ~☆~ site • http://zazarteando.tumblr.com o livro "uma flávia em um milhão" • booktrailer: https://youtu.be/Qh0VwZYJTAQ • vem ler os primeiros capitulos: https://www.wattpad.com/story/51366281-uma-flávia-em-um-milhão • vem ter esse livro: https://www.chiadobooks.com/livraria/uma-flavia-em-um-milhao ☆ https://www.livrariacultura.com.br/p/livros/literatura-nacional/ficcao-fantasiosa/uma-flavia-em-um-milhao-2000062061 zazarte {canal de artemanhas} • https://www.youtube.com/channel/UC9OJPmbVGuHIWIhzbmvKtfQ ☆ trailers ☆: https://www.youtube.com/playlist?list=PLmIFhvZEkK0KkSx_jD4dRjIy2UaXh-qxU ☆ curtas-metragens ☆: https://www.youtube.com/playlist?list=PLmIFhvZEkK0Kv80j1C8QUvOLvMg_qbp5g ☆ websérie "detetive baby" ☆: https://www.youtube.com/playlist?list=PLmIFhvZEkK0J98HhgHOyiLzWUgb6BuxuA ☆ reality "keeping up with the morales" ☆: https://www.youtube.com/playlist?list=PLmIFhvZEkK0IkDZl1WiBfC5jZu4Xl7L9c ☆ websérie "apê 52" ☆: https://www.youtube.com/playlist?list=PLmIFhvZEkK0IixnHfSbX_JAiPFZ2Tmg8r fotos lindas por apenas dois reais?! • https://youtu.be/JBwapA7P2PQ ☆ http://zazarteando.tumblr.com/fotografiazz instagram • http://instagram.com/zazarte facebook • http://facebook.com/zazarteando dezazabafe {um espaço para soltar o verbo} • http://zazarteando.tumblr.com/ask contatinho profissional • [email protected] ~☆~ bibliografia • roteiro do material objetivo e as primeiras três fontes da busca do título desta zazaula no Google e no YouTube música • "Jazz in Paris" da Youtube Audio Library {https://youtu.be/p5qSg2wjCZA} e "Macintosh Plus" edição • KineMaster {link para download https://drive.google.com/file/d/1E-9l-V-KLy3V82W3-YfvBlffFhZ7_NCu/view?usp=drivesdk} realização zazarte ☆ LICENÇA DE USO ☆ não há intenção de infringir direitos autorais. Todas as imagens são retiradas da primeira página de busca do Google Imagens a fim de recriar esteticamente o primeiro conteúdo que esta busca traz ao internauta. Todas as imagens utilizadas nesse vídeo são criações originais ou de propriedade dos autores e foram utilizadas sob a conformidade da lei de Direitos Autorais, Capítulo IV, Artigo 46 onde materiais protegidos podem ser utilizados parcialmente com finalidade de notícia ou de artigo informativo, crítica e paródia. A utilização das imagens também estão sob conformidade de Uso Justo (Fair Use) ~~~ http://creativecommons.org/licenses/by/3.0/deed.pt_BR
Views: 134 zazaulaz
Probing Platypus Evolution | National Geographic
 
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National Geographic researchers are trying to collect DNA samples from these odd duck-billed mammals to determine whether there are separate subspecies. ➡ Subscribe: http://bit.ly/NatGeoSubscribe About National Geographic: National Geographic is the world's premium destination for science, exploration, and adventure. Through their world-class scientists, photographers, journalists, and filmmakers, Nat Geo gets you closer to the stories that matter and past the edge of what's possible. Get More National Geographic: Official Site: http://bit.ly/NatGeoOfficialSite Facebook: http://bit.ly/FBNatGeo Twitter: http://bit.ly/NatGeoTwitter Instagram: http://bit.ly/NatGeoInsta Probing Platypus Evolution | National Geographic https://youtu.be/OVneqhu9oZk National Geographic https://www.youtube.com/natgeo
Views: 1244612 National Geographic
Sex Determination in Fish
 
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Views: 174 butt
TROM: Behaving: From Genes to Gender
 
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Solutions at https://www.tromsite.com/ Support us at: https://www.patreon.com/trom Video based on the TROM ebook “Behaving: From Genes to Gender” - https://www.tromsite.com/2015/04/behaving-from-genes-to-gender/ - you can find all of the sources for all of the claims in the book. Here you can access all of the TROM Series Episodes (you can also find everything you need to make subtitles or voice overs in other languages) - https://www.tromsite.com/series/ “I want to offer further explanations and provide an article with new examples and facts about what generates everyone’s personality, including yours and mine. We will look at the gay gene, the alcoholism gene, or the violence gene, and see if they make any sense in a scientific context.” ----------------------------------- We do not own all of the materials from this video, and the following video segments are used for commentary, educational, and sourcing purposes: - Secret of the Wild Child https://vimeo.com/65190917 - Feral Children http://channel.nationalgeographic.com/videos/feral-children/ - Me, My Sex, and I http://www.bbc.co.uk/programmes/b0139jv4 - Sex Swap https://en.wikipedia.org/wiki/Taboo_(TV_series) - Inequality Within India s Third Gender Community https://www.youtube.com/watch?v=3ssigT1dOWU - BBC - Horizon - Are You Good or Evil http://www.bbc.co.uk/programmes/b014kj65 - BBC Do You See What I See http://www.bbc.co.uk/news/science-environment-14421303 - Tourette s Syndrome - Life With Tourette's https://www.youtube.com/watch?v=jYRa-fpNonY - 3 Men With Tourettes On A Holiday https://www.youtube.com/watch?v=KzGBngoXooM - Male to Female Transition Timeline https://www.youtube.com/watch?v=tyd82y8tFOg - Rag n Bone Man - Human https://www.youtube.com/watch?v=L3wKzyIN1yk Music (copyright free): WATER Cinematic Music (Emotional Piano Atmosphere) Joachim Heinrich Help us caption & translate this video! http://amara.org/v/2BSa/
Views: 1666 TROM Series
Temperature-dependent sex-reversal by a transformer-2 gene-edited mutation in the spotted wing
 
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Temperature-dependent sex-reversal by a transformer-2 gene-edited mutation in the spotted wing drosophila, Drosophila suzukii. Jianwei Li and Alfred M. Handler (2017), Scientific Reports https://doi.org/10.1038/s41598-017-12405-4 Female to male sex reversal was achieved in an emerging agricultural insect pest, Drosophila suzukii, by creating a temperature-sensitive point mutation in the sex-determination gene, transformer-2 (tra-2), using CRISPR/Cas9 (clustered regularly interspaced palindromic repeats/CRISPR-associated) homology-directed repair gene-editing. Ds-tra-2ts2 mutants developed as normal fertile XX and XY adults at permissive temperatures below 20 °C, but at higher restrictive temperatures (26 to 29 °C) chromosomal XX females developed as sterile intersexuals with a predominant male phenotype, while XY males developed with normal morphology, but were sterile. The temperature-dependent function of the Ds-TRA-2ts2 protein was also evident by the up- and down-regulation of female-specific Ds-Yolk protein 1 (Ds-Yp1) gene expression by temperature shifts during adulthood. This study confirmed the temperature-dependent function of a gene-edited mutation and provides a new method for the more general creation of conditional mutations for functional genomic analysis in insects, and other organisms. Furthermore, it provides a temperature-dependent system for creating sterile male populations useful for enhancing the efficacy of biologically-based programs, such as the sterile insect technique (SIT), to control D. suzukii and other insect pest species of agricultural and medical importance.
Views: 49 ScienceVio
Sex linked traits
 
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Views: 5521 mrerlendson
What Do Turtles Do?
 
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The five most important things to do when keeping aquatic turtles. What do sea turtles eat? a turtle eats depends upon the but studies have shown that disease is not passed vertically from parent to offspring via egg, so baby hatch with bacterial organism itself 31 oct 2009 begin hibernation process, turtle's metabolic rate must drop low they expend any energy or require food. What do turtles eat? Feeding a pet turtle the same? Youtube. It also includes specific information for many different types of turtles check out our turtle feeding guide to learn what pet eat and they shouldn't. Commercial turtle pellets and fish pellets, as well gut loaded insects (bugs with nutrient rich diets), earthworms small fish, are often sold food at pet stores sea turtles typically feed on jellyfish, sponge, other soft bodied organisms. What do pet turtles eat? 3 ways to keep your turtle happy wikihow. What do turtles eat? Small pets lovetoknow. Though everything about them looks somewhat awkward, turtles are interesting animals to observe in the wild or captivity. What do turtles eat. What do turtles eat human foods that pet youtubefeeding a red eared slider turtle what the sprucebasic facts about sea eat? Backwater reptilessea diet see. Where do turtles go in the winter? What pet eat? . In either case, it is important to 12 may 2014 many species of turtles are commonly kept as pets, and just like their wild cousins, they eat a diverse range foods. Animals mom what do turtles eat? Live sciencewhat eat. Me turtles during daytime night 5905. As pets, red eared sliders and other aquatic it is difficult to find population numbers for sea turtles because male juvenile do not return shore once they hatch reach the ocean, which are you wondering what eat? Would like know details? Read this article understand feed your pet turtle learn about baby how can help them survive! hatchlings have sex chromosomes so their gender determined by favorite foods of including jellyfish, grass, more. Html url? Q webcache. A turtle's heart 23 apr 2016 what do turtles eat? The variety in species makes this an answer that depends on type of turtle you are talking aboutWhat eat. Learn what to feed turtles in a proper nutritious diet on petmd 15 mar 2017 take pleasure from spending time land and water, so creating an environment that allows them do both will make happy 12 apr the type of things you should your turtle includes crickets, i if my baby aquatic not eat greens or fruit? Wikihow there are several types could own as pet, including have teeth use their jaws cut food into bite sized pieces 9 dec 2013. Now where can we buy adopt a pet turtle? Q do turtles carry lot of germs or 7 aug 2017 red eared slider are aquatic that have been popular as pets for long time. Living in the wild, red eared slider turtles feed on aquatic vegetation, little fish, and material that is decaying such as frogs dead fish. How to know what feed a turtle 9 steps (with pictures). What do turtles during the dayt
Views: 3 K Answers
Research: Mussel Sexes
 
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Researcher Megan Hess is awarded for her work in determining sex ratios in imperiled freshwater mussel species.
‘third ’ lizards could outcompete their normal female cousins
 
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‘third ’ lizards could outcompete their normal female cousins Sex is never simple—even among lizards. Unlike mammals, the sex of central bearded dragons, large lizards found in eastern Australia, is determined by their chromosomes and the environment. If the eggs are incubated in high temperatures, male embryos turn into females. Such sex-reversed lizards stil...
Views: 2 Science News
Komodo Dragon hatching from a parthenogenetic egg
 
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Wichita, KS - Sedgwick County Zoo has become the first zoo in the Americas to document that Komodo dragons are capable of parthenogenesis (reproduction without the contribution of a male). One Komodo dragon entered the world on January 31 and a second hatched on February 1, 2008 thanks to this type of asexual reproduction. Parthenogenesis is a reproductive process that occurs naturally in some species including invertebrates, lower plants, and less commonly in vertebrates such as reptiles and fish. A parthenogenetic egg needs no fertilization from a male because it inherits and duplicates the mother's chromosome. Based on a Komodo dragon's genetics of sex determination, hatchlings reproduced in this way will always be male. To inspire discovery, appreciation, and respect for animals and nature. The Sedgwick County Zoo is a not-for-profit organization, accredited by the Association of Zoos and Aquariums (AZA). Look for the AZA logo whenever you visit a zoo or aquarium as your assurance that you are supporting a facility dedicated to providing excellent care for animals, a great experience for you and a better future for all living things. With its more than 200 accredited members, AZA is a leader in global wildlife conservation and your link to helping animals in their native habitats. For more information, visit http://www.aza.org/. Sedgwick County Zoo is also a member of the World Association of Zoos and Aquariums http://www.waza.org/. Sedgwick County Zoo has been recognized with national and international awards for its support of field conservation programs and successful breeding of rare and endangered species. It's the No. 1 outdoor family tourist attraction in Kansas and is home to more than 2,000 animals of nearly 400 different species. For more information, visit www.scz.org.
Views: 13561 jkrehbiel1
Animal Reproduction
 
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BIOL 181 lecture on the diversity of animal reproduction
Views: 130 Dr. Claire Says
My birds having sex
 
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This video was uploaded from an Android phone.
Views: 152 rm101077
Bebe Rexha - I Can't Stop Drinking About You [Official Music Video]
 
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Check out the official music video for Bebe Rexha's "I Can't Stop Drinking About You"! Bebe Rexha's "I Don't Wanna Grow Up" EP is available now on iTunes! Download it here: smarturl.it/IDontWannaGrowUpEP LISTEN Available on iTunes: http://bit.ly/1ouIvWw Available on Spotify: http://smarturl.it/ICSDAYSpotify CONNECT WITH BEBE Offical Website: http://www.beberexha.com Facebook: https://www.facebook.com/Beberexha Twitter: http://www.twitter.com/BEBEREXHA Instagram: http://instagram.com/beberexha Youtube: http://www.youtube.com/BEBEREXHA Soundcloud: https://soundcloud.com/beberexha LYRICS No ones gonna love you like I do. No ones gonna care like I do. And I can feel it in the way that you breathe. I know you dream of her while you sleep next to me. I can't stop drinking about you. I gotta numb the pain. I can't stop drinking about you. Without you I ain't the same. So pour a shot in my glass and I'll forget forever! So pour a shot in my glass cause it makes everything better! Darlin tell me what more can I do? Don't you know that I was meant for you? You say I feel like heaven on earth, But You'd never know what heaven was if it wasn't for... her. I can't stop drinking about you. I gotta numb the pain. I can't stop drinking about you. Without you I ain't the same. So pour a shot in my glass and I'll forget forever! So pour a shot in my glass cause it makes everything better! I can't stop drinking about you. I can't stop drinking about you. No ones gonna love you like I do. I can't stop drinking about you. I can't stop drinking about you. So pour a shot in my glass and I'll forget forever! So pour a shot in my glass cause it makes everything better! No ones gonna love you like I do.
Views: 19261834 Bebe Rexha