xanthochromism

Xanthochromism is a rare genetic mutation that causes an animal to have a yellowish or golden coloration instead of its typical pattern. This is distinct from albinism, which results in a complete lack of pigment, and leucism, which causes a partial loss of pigmentation. In xanthochromism, the animal still produces melanin, but the underlying genetic mutation affects how the pigments are deposited, leading to a yellow hue. This condition can occur in various animal species, including reptiles, amphibians, fish, and birds.

The genetic basis of xanthochromism is not always fully understood and can vary between species. It is often caused by a recessive gene, meaning that an animal must inherit two copies of the gene to exhibit the trait. This can sometimes lead to offspring of normally colored parents displaying xanthochromism if both parents are carriers of the gene. While the coloration is the most prominent feature, xanthochromism does not typically affect the animal's health or lifespan, although it can make them more conspicuous to predators and potentially impact their camouflage.