24/ However, S is codominant to s, meaning that you see BOTH color patches and white patches on one cat (see also: spotted cows and ABO blood types), AND S has variable expression, meaning % white fur can be different amounts in cats with the same genotype.
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35/ This protein unfolds when it gets too hot, preventing melanin from forming properly, but at cooler temps works just fine. Body temp is warmer towards the core and cooler towards the extremities (ears, tail, feet, etc), so pigment forms only where the body is cooler.
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36/ The wild-type dominant C allele = full-body color. Recessive c allele = colorpoint. There's actually a couple different variants of c that lead to more or less difference in the color of the core vs extremities (look up Siamese vs Burmese).
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37/ A lot of people incorrectly call all colorpoint cats Siamese, but Siamese cats are actually a very specific breed. Your average street cat can be a colorpoint but not a Siamese.
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38/ You can also get color points in ANY pigment color, like orange or grey! Here is Bububu, a majestic three-legged cat I catsit who is a blue tabby colorpoint. [B- dd A- T-] = Black dilute Agouti Tabby)pic.twitter.com/lezVWJhZLb
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39/ Also, as cats age, their body temperature drops. So, as colorpoint cats age, their whole body tends to get a bit darker over time!
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40/ You can also see colorpoint differences depending on geography and season due to differences in local temperature. Colorpoint cats are basically furry thermometers.
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41/ Anyway, I hope you learned something new and exciting about cat coat color today! These are merely the basics, because genetics are delightfully weird and complicated.
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42/ For more info that's not too technical, I recommend the Wikipedia page on cat coat genetics (and cited links): https://en.wikipedia.org/wiki/Cat_coat_genetics ….
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43/ For a wonderfully detailed deep-dive on cat genetics of all sorts of traits, I highly recommend the site Messybeast: http://messybeast.com/catarchive.htm
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44/ Also, shoutout to a cat genetics blog/Twitter recommendation I got from my previous post!
@sparrowsgardenhttps://www.sparrows-garden.com/geneticsPrikaži ovu nit -
45/ Adopt, don't shop, spay/neuter your cats, take them to the vet regularly, vaccinate them, keep them indoors only, and for goodness sakes do NOT feed them vegan food. They are adorable little carnivores who need their meat.
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46/ Thank you all for indulging my deep nerdiness for both cats and science. If you would like to learn more about specific cat genetics or have any questions, I will do my best to google my way to an answer! And please post your cat photos below as well, the more the merrier
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43.5/ This is the page on Messybeast specifically on coat color and patterns. Great info in particular on tabby variations and white patterns (i.e. tuxedo) and how development plays a role in patterning! http://messybeast.com/colour-charts.htm …
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47/ A couple educators asked me if they can use this thread/examples for teaching, so to make it public: YES PLEASE! I would LOVE for anyone to spread the love of cats & genetics to students of all ages, so feel free to use these examples! You have my blessing (and my cat pics)
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