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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.
This leucistic Indian peacock, Pavo cristatus, is unlikely to find a mate and reproduce in a natural setting due to its unusual coloration.However, its striking colour is appreciated by humans, and may be included in artificial selective breeding to produce more individuals with the leucistic phenotype.
Leucism, a partial loss of pigmentation that results in animals with pale or white skin, hair and/or feathers; Melanosis, hyperpigmentation via increased melanin Ocular melanosis; Peutz–Jeghers syndrome, dark patches on the lips etc. Piebaldism, patchy absence of melanin-producing cells
A piebald mare. In British English piebald (black and white) and skewbald (white and any colour other than black) are together known as coloured.In North American English, the term for this colouring pattern is pinto, with the specialized term "paint" referring specifically to a breed of horse with American Quarter Horse or Thoroughbred bloodlines in addition to being spotted, whereas pinto ...
The genetic pigmentation disorder isabellinism seen in birds is derived from the colour word and is a form of leucism caused by a uniform reduction in the production and expression of melanin resulting in areas of plumage on the back of the bird, normally black, being strongly faded, or isabelline, in appearance. [10]
Piebaldism is an autosomal dominant [4] hereditary condition, which tends to produce high rates of inheritance and long chains of generational transmission. All who inherit the gene have at some time in life evidence of piebald hypopigmentation of the hair or skin, most likely both.
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Leucism is a rare genetic pattern that causes a reduction in the pigment of an animal's hair and skin. The natural colour of the red deer ranges from dark red to brown.They are often thought to be albinos; however, unlike albinos, who have characteristically red eyes, deer with leucism have normal colouring in their eyes.