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Which human trait shows the greatest known genetic variation in normal populations?
GeneticsHuman variation
Quick Answer
Human skin pigmentation shows some of the widest natural genetic variation among visible traits. It is influenced by multiple genes, especially those affecting melanin.
The Full Story
Human skin pigmentation is one of the most visibly variable traits in the species, shaped by many genes and by environmental adaptation. Variants in genes such as MC1R, SLC24A5, SLC45A2, and others influence melanin production and distribution. This variation evolved partly in response to different levels of ultraviolet radiation around the world. Skin pigmentation is a classic example of how genetics and environment interact in human evolution.
Key Facts
1.Skin pigmentation is controlled by multiple genes
2.Melanin production is strongly influenced by genes such as MC1R and SLC24A5
3.Variation is linked to adaptation to sunlight and UV exposure
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Suggested video title for this topic:
"Why human skin color varies so widely around the world."