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  2. Vitiligo - Wikipedia

    en.wikipedia.org/wiki/Vitiligo

    Vitiligo (/ ˌ v ɪ t ɪ ˈ l aɪ ɡ oʊ /, vi-ti-leye-goh) is a chronic autoimmune disorder that causes patches of skin to lose pigment or color. [1] The cause of vitiligo is unknown, but it may be related to immune system changes, genetic factors, stress, or sun exposure.

  3. Human skin color - Wikipedia

    en.wikipedia.org/wiki/Human_skin_color

    Vitiligo is a condition that causes depigmentation of sections of skin. It occurs when melanocytes die or are unable to function. It occurs when melanocytes die or are unable to function. The cause of vitiligo is unknown, but research suggests that it may arise from autoimmune , genetic, oxidative stress , neural, or viral causes. [ 116 ]

  4. Dominance (genetics) - Wikipedia

    en.wikipedia.org/wiki/Dominance_(genetics)

    Autosomal dominant and autosomal recessive inheritance, the two most common Mendelian inheritance patterns. An autosome is any chromosome other than a sex chromosome.. In genetics, dominance is the phenomenon of one variant of a gene on a chromosome masking or overriding the effect of a different variant of the same gene on the other copy of the chromosome.

  5. Leucism - Wikipedia

    en.wikipedia.org/wiki/Leucism

    Leucistic white lions owe their colouring to a recessive allele. Note the eyes and lips remain the normal colour. Studies have shown that the reduced pigment comes from a mutation in the gene for tyrosinase, the same as causes Type I oculocutaneous albinism in humans. [1] This white horse owes its coloring to a dominant allele (dominant white).

  6. Atavism - Wikipedia

    en.wikipedia.org/wiki/Atavism

    [citation needed] This had been bred from ancient landraces with selected primitive traits, in an attempt of "reviving" the aurochs, an extinct species of wild cattle. [ citation needed ] The same notions of atavisms were used by social Darwinists , who claimed that "inferior" races displayed atavistic traits, and represented more primitive ...

  7. Sex-limited genes - Wikipedia

    en.wikipedia.org/wiki/Sex-limited_genes

    The idea of sex-limited genes was initially developed by Charles Darwin in 1871 in his book The Descent of Man and Selection in Relation to Sex. [6] He did not distinguish between sex-limited, sex-linked, and sex-influenced genes, but referred to any gene that expresses differently between sexes as sex-limited.

  8. Sociobiology - Wikipedia

    en.wikipedia.org/wiki/Sociobiology

    Sociobiology is a field of biology that aims to explain social behavior in terms of evolution.It draws from disciplines including psychology, ethology, anthropology, evolution, zoology, archaeology, and population genetics.

  9. Sex linkage - Wikipedia

    en.wikipedia.org/wiki/Sex_linkage

    X-linked dominant traits can affect females as much as males. X-linked dominant inheritance, sometimes referred to as X-linked dominance, is a mode of genetic inheritance by which a dominant gene is carried on the X chromosome. As an inheritance pattern, it is less common than the X-linked recessive type.