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Definitions of the eye color "hazel" vary: it is sometimes considered to be synonymous with light brown or gold, as in the color of a hazelnut shell. [38] [40] [43] [45] Around 18% of the US population and 5% of the world population have hazel eyes. [28] 55.2% of Spanish subjects in a series of 221 photographs were judged to have hazel eyes. [46]
Name: OMIM: Gene: Description: OCA1: 203100 606952: TYR: OCA1 is caused by mutations of the tyrosinase gene, and can occur in two variations. The first is OCA1a, and means that the organism cannot synthesize melanin whatsoever. [6] The hair is usually white (often translucent) and the skin is very pale. Vision usually ranges from 20/200 to 20/400.
For example, having eye color is a character of an organism, while blue, brown and hazel versions of eye color are traits. The term trait is generally used in genetics , often to describe phenotypic expression of different combinations of alleles in different individual organisms within a single population , such as the famous purple vs. white ...
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They conclude that "caution should be used when using geographic or genetic ancestry to make inferences about individual phenotypes", [109] and "The fact that, given enough genetic data, individuals can be correctly assigned to their populations of origin is compatible with the observation that most human genetic variation is found within ...
Blumenbach does not name his five groups in 1779 but gives their geographic distribution. The color adjectives used in 1779 are weiss "white" ( Caucasian race ), gelbbraun "yellow-brown" ( Mongolian race ), schwarz "black" ( Aethiopian race ), kupferrot "copper-red" ( American race ) and schwarzbraun "black-brown" ( Malayan race ). [ 11 ]
[15] [16] Accepted eye colors are black, brown, blue and hazel. However, horses with blue or partially blue eyes are accepted only if their registration certificate from a recognized breed association mentions the eye color; they are also accepted on horses of unknown pedigree if they are gelded or spayed. [15] [16]
This is an accepted version of this page This is the latest accepted revision, reviewed on 14 January 2025. "Skin pigmentation" redirects here. For animal skin pigmentation, see Biological pigment. Extended Coloured family from South Africa showing some spectrum of human skin coloration Human skin color ranges from the darkest brown to the lightest hues. Differences in skin color among ...