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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]
This is an accepted version of this page This is the latest accepted revision, reviewed on 4 January 2025. African-American woman (1920–1951), source of HeLa immortal cell line "Lacks" redirects here. For other uses, see Lack. Henrietta Lacks Lacks c. 1945–1951. Born Loretta Pleasant (1920-08-01) August 1, 1920 Roanoke, Virginia, U.S. Died October 4, 1951 (1951-10-04) (aged 31) Baltimore ...
People with OCA2 usually have fair skin, but are often not as pale as OCA1. 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.
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The affected eye may be hyperpigmented (hyperchromic) or hypopigmented (hypochromic). [3] In humans, an increase of melanin production in the eyes indicates hyperplasia of the iris tissues, whereas a lack of melanin indicates hypoplasia. The term is derived from Ancient Greek: ἕτερος, héteros "different" and χρῶμα, chrôma "color ...
Some differences in human appearance are genetic, others are the result of age, lifestyle or disease, and many are the result of personal adornment. Some people have linked some differences with ethnicity, such as skeletal shape, prognathism or elongated stride. Different cultures place different degrees of emphasis on physical appearance and ...
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 ...