Dating site meme guy with long hair dating shy guy help
The MC1R recessive variant gene that gives people red hair generally results in skin that is unable to tan.Because of the natural tanning reaction to the sun's ultraviolet light and high amounts of pheomelanin in the skin, freckles are a common but not all-inclusive feature of red-haired people.
Studies by Bodmer and Cavalli-Sforza (1976) hypothesized that lighter skin pigmentation prevents rickets in colder climates by encouraging higher levels of vitamin D production and also allows the individual to retain heat better than someone with darker skin. concluded that red hair is not the result of positive selection but of a lack of negative selection.
The lower melanin concentration in skin confers the advantage that a sufficient concentration of important Vitamin D can be produced under low light conditions.