Basically, why arent’s there any people with colouration like tortoiseshell cats, Dalmatian dogs, or Holstein cows?
In: Biology
Spots in animals are the result of people selecting for rare color variations like piebaldism. People have a bunch of cows, one day one is born with splotches, and they keep it around and breed it because they like the way it looks, and soon there are loads of co.
Most of the same color variations sometimes show up in humans too, but they aren’t favored in the same ways. The people with them don’t go on to have many more kids than the people without them. So the rare color variations stay rare and you hardly ever see them, and they don’t spread enough to be combined or develop further mutations.
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