Search results
Results from the WOW.Com Content Network
Blond hair is controlled by an allele that is recessive to most alleles responsible for darker hair, [1] but it is not a disappearing gene.. The "disappearing blonde gene" refers to a hoax that emerged in parts of the Western world in the early 2000s, claiming that a scientific study had estimated that blonds would become extinct within the next two centuries.
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).
This overproduction causes depletion of the melanocyte stem cells which are required to produce melanin, the pigment responsible for hair color. [ 2 ] Premature greying of hair has been observed with greater frequency among certain families, suggesting a familial predisposition for the condition.
The order in which greying happens is usually: nose hair, hair on the head, beard, body hair, eyebrows. [ 2 ] [ failed verification ] Greying is a gradual process; according to a study by L'Oreal , overall, of those between 45 and 65 years old, 74% had some grey hair, covering an average of 27% of their head, and approximately 1 in 10 people ...
Patients with more severe cases of loose anagen hair syndrome can be treated with minoxidil, a topical medical treatment, as a first line treatment. [3] Minoxidil can extend the duration of the hair in the anagen stage and restore the hair follicles for further growth or for the full period of the anagen phase.
They have pale blonde to golden, strawberry blonde, or even brown hair, and most commonly blue eyes. Affected people of African descent usually have a different phenotype (appearance): yellow hair, pale skin, and blue, gray or hazel eyes. About 1 in 15,000 people have OCA2. [13] [12] The gene MC1R does not cause OCA2, but does affect its ...
For premium support please call: 800-290-4726 more ways to reach us
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.