Climate data for henderson 7 ssw, Longitude: -87.6455, Latitude: 37.7558 Average weather Henderson, KY - 42420 - 1981-2010 normals Jan: January, Feb: February, Mar: March, Apr: April, May: May, Jun: June, Jul: July, Aug: August, Sep: September, Oct: October, Nov: November, Dec: December
Skin color is due primarily to the presence of a pigment called melanin , which is controlled by at least 6 genes. Both light and dark complexioned people have melanin. However, two forms are produced--pheomelanin , which is red to yellow in color, and eumelanin , which is dark brown to black. People with light complexioned skin mostly produce pheomelanin, while those with dark colored skin mostly produce eumelanin.
It seems like the dark skin is the original phenotype and that Homo sapiens developed light skin in several different ways, but dark skin only once (38). In other words, it is more difficult to evolutionary develop dark skin than light skin.This idea is supported by the genetic system of skin colour.ntroduction There is a strong correlation between skin colour of humans and UV radiation intensity (1, 2), indicating that the variation in skin pigmentation with latitude is a result of adaptation to different UV environments via natural (1) and/or sexual (3, 4) selection.