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leucism/piebaldism and heterochromia


kakapo123

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I've seen a lot of requests for heterochromia, which I think would be quite cool, but genetically inherited heterochromia is only know to be caused by Horner syndrome, Waardenburg syndrome and leucism. I'm not sure what the first 2 are, but leucism is a genetic trait which causes partial but not complete loss of pigment. We already have albinism and melanism, so this gene would be pretty cool to add too

Leucistic animals are often mistaken for albinos. Although both have white fur and pink skin due to lack of pigmentation, leucistic animals don't have fully unpigmented, red eyes. Leucism never completely removes pigment from the eye, but can cause heterochromia or blue eyes by reducing pigment. This would give the same white fur and pink nose as albinos, but the eyes wouldn't be red. Instead, there would be a 50% chance of blue eyes, a 25% chance of heterochromia and a 25% chance that the eyes would be unaffected

Partial leucism, or piebaldism, is a form of leucism where only some of the fur and skin is unpigmented. Heterochromia and blue eyes can also be caused by partial leucism, but aren't quite as likely as in fully leucistic animals. This would cause the nicheling to have white fur with patches of coloured fur. There would be a 25% chance of blue eyes, a 25% chance of heterochromia and a 50% chance for the eyes to be unaffected

Leucism is often associated with deafness or partial loss of hearing, especially if it causes heterochromia or blue eyes. In leucistic nichelings it would give a 50% chance of -1 hearing if both eyes are blue, a 25% chance if 1 eye is blue and a 10% chance if the eyes are unaffected. In partially leucistic nichelings there would be a lower chance of hearing impairment. If the eyes are both blue then there would be a 25% chance of -1 hearing and if 1 eye is blue there would be a 10% chance of -1 hearing. If the eyes are unnaffected then there would be a 0% chance of hearing impairment

Genetics wise, leucism would be codominant with no leucism. A nicheling with 2 alleles for no leucism would be unaffected, a nicheling with 2 alleles for leucism would be completely white and a nicheling with 1 of each allele woud be partially leucistic

This other post also suggests piebaldism, but doesn't include complete leucism. It also doesn't mention the association with deafness, but you should upvote it, piebaldism would still be pretty cool without the debuffs 

This post here also mentions some debuffs for albinism including lowered eyesight and no protection from UV rays which would be pretty good to add 

 

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