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The Fischer–Saller scale, named after Eugen Fischer and Karl Saller is used in physical anthropology and medicine to determine the shades of hair color. The scale uses the following designations: A (very light blond), B to E (light blond), F to L (), M to O (dark blond), P to T (light brown to brown), U to Y (dark brown to black) and Roman numerals I to IV and V to VI (red-blond).
Poliosis circumscripta, commonly referred to as a "white forelock", is a condition characterized by localized patches of white hair due to a reduction or absence of melanin in hair follicles. Although traditionally associated with the scalp, poliosis can affect any hairy area on the body, including eyebrows, eyelashes, and beards.
Melanin is the protein that creates skin, eye and hair color. More melanin means darker eyes, hair or skin. The color of the melanin in the eyes is determined by three other genes, EYCL1, 2 and 3.
Pili annulati (also known as "ringed hair") [1] is a genetic trait in which the hair seems 'banded' by alternating segments of light and dark color when seen in reflected light. [1] [2]: 767 [3]: 640 [4] Pili annulati manifests during infancy or at birth. The clinical manifestation varies. Usually, the hair appears shiny and banded.
Genetic testing can confirm albinism and what variety it is, but offers no medical benefits, except in the case of non-OCA disorders. Such disorders cause other medical problems in conjunction with albinism, and may be treatable. Genetic tests are currently available for parents who want to find out if they are carriers of ty-neg albinism.
A designer baby is a baby whose genetic makeup has been selected or altered, often to exclude a particular gene or to remove genes associated with disease. [1] [2] This process usually involves analysing a wide range of human embryos to identify genes associated with particular diseases and characteristics, and selecting embryos that have the desired genetic makeup; a process known as ...
Prepubertal hypertrichosis is characterized by an excess of hair growth, seen during birth and progressing during childhood. [3] [6] In generalized hypertrichosis, excessive hair growth occurs all over the body, whereas in localized hypertrichosis, excessive hair growth only occurs in certain areas of the body. [2]
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