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The Delightful Mutation Behind Siamese Cats

It's easy to assume a cat's coat pattern is based exclusively on genetics, but that isn't entirely the case for Siamese cats. Their unique coloration comes from a combination of genetics, a fragile enzyme, and losing heat from little noses and toe beans. Hosted by: Hank Green SciShow has a spinoff podcast! It's called SciShow Tangents. Check it out at http://www.scishowtangents.org ---------- Support SciShow by becoming a patron on Patreon:   / scishow   ---------- Huge thanks go to the following Patreon supporters for helping us keep SciShow free for everyone forever: Kevin Bealer, Jacob, Katie Marie Magnone, D.A.Noe, Charles Southerland, Eric Jensen, Christopher R Boucher, Alex Hackman, Matt Curls, Adam Brainard, Scott Satovsky Jr, Sam Buck, Ron Kakar, Chris Peters, Kevin Carpentier, Patrick D. Ashmore, Piya Shedden, Sam Lutfi, charles george, Greg ---------- Looking for SciShow elsewhere on the internet? Facebook:   / scishow   Twitter:   / scishow   Tumblr:   / scishow   Instagram:   / thescishow   ---------- Sources: https://www.ncbi.nlm.nih.gov/pmc/arti... http://www.bio.miami.edu/dana/dox/cal... https://onlinelibrary.wiley.com/doi/a... https://www.sciencedirect.com/science... https://www.ncbi.nlm.nih.gov/pmc/arti... https://www.ncbi.nlm.nih.gov/pmc/arti... https://onlinelibrary.wiley.com/doi/f... https://journals.physiology.org/doi/a... https://books.google.com/books?hl=en&... https://www.ncbi.nlm.nih.gov/pubmed/1... https://sciencing.com/ice-cube-shapes... https://journals.sagepub.com/doi/pdf/... https://academic.oup.com/jhered/artic... Newborn Siamese Kittens, Black Zero https://www.flickr.com/photos/zillay/... Tyrosinase https://commons.wikimedia.org/wiki/Fi... https://www.istockphoto.com/photo/out... https://www.istockphoto.com/photo/jag... https://www.istockphoto.com/photo/sid... https://www.istockphoto.com/photo/dom... https://www.istockphoto.com/photo/gin... https://www.istockphoto.com/photo/gre... https://www.istockphoto.com/photo/sia... https://www.istockphoto.com/photo/pho... https://www.istockphoto.com/photo/cut... https://www.istockphoto.com/photo/ful...