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Leucism (/ ˈ l uː s ɪ z əm,-k ɪ z-/) [2] [3] [4] is a wide variety of conditions that result in partial loss of pigmentation in an animal—causing white, pale, or patchy coloration of the skin, hair, feathers, scales, or cuticles, but not the eyes. [4] It is occasionally spelled leukism.
The shells have an almost yellow colouration and they have pink eyes. For turtles, a pure white colour is nearly impossible, even with albinism. Albino turtles can have a longer lifespan than many other albino animals; their hard shells help to prevent predation and other environmental challenges. Vision and sensory organs are slightly affected ...
Siamese cats are also sometimes cross-eyed, as are some albino ferrets. The visual pathway abnormality was first documented in white tigers in the brain of a white tiger called Moni after he died, although his eyes were of normal alignment. The abnormality is that there is a disruption in the optic chiasm. The examination of Moni's brain ...
Only one in 10,000 to 20,000 raccoons are born with the albino mutation, according to wildlife experts.The chances of actually seeing one, however, are only one in 750,000.
Albinism is a rare genetic condition that causes a lack of pigmentation in the skin, hair and eyes. Because the gene itself is so rare, albino dogs are also incredibly rare.
The appearance of an amelanistic animal depends on the remaining non-melanin pigments. The opposite of amelanism is melanism, a higher percentage of melanin. [citation needed] A similar condition, albinism, is a hereditary condition characterised in animals by the absence of pigment in the eyes, skin, hair, scales, feathers or cuticle. [1]
Down syndrome or Down's syndrome, [12] also known as trisomy 21, is a genetic disorder caused by the presence of all or part of a third copy of chromosome 21. [3] It is usually associated with developmental delays, mild to moderate intellectual disability , and characteristic physical features.
None of Snowflake's offspring were albino, but all should be heterozygous, recessive carriers, for the albino gene. [15] Half of his grandchildren likely carry the albino gene. If both parents were albino gene carriers, they have a 25% chance of producing an albino offspring and a 50% chance that the offspring will be a carrier of the gene. [16]