Human skin color ranges from the darkest brown to the lightest hues. Differences in skin color among individuals is caused by variation in pigmentation, which is the result of genetics (inherited from one's biological parents and or individual gene alleles), exposure to the sun, natural and sexual selection, or … Meer weergeven Melanin is produced by cells called melanocytes in a process called melanogenesis. Melanin is made within small membrane–bound packages called melanosomes. As they become full of melanin, … Meer weergeven The understanding of the genetic mechanisms underlying human skin color variation is still incomplete; however, genetic studies have discovered a number of genes … Meer weergeven It has been observed that females are found to have lighter skin pigmentation than males in some studied populations. This may be a form of sexual dimorphism due to the … Meer weergeven Melanin in the skin protects the body by absorbing solar radiation. In general, the more melanin there is in the skin the more solar radiation can be absorbed. Excessive solar radiation causes direct and indirect DNA damage to the skin and the body … Meer weergeven Loss of body hair in Hominini species is assumed to be related to the emergence of bipedalism some 5 to 7 million years ago. Bipedal hominin body hair may have disappeared gradually to allow better heat dissipation through sweating. The emergence … Meer weergeven In hominids, the parts of the body not covered with hair, like the face and the back of the hands, start out pale in infants and turn darker as the skin is exposed to more sun. … Meer weergeven Uneven pigmentation of some sort affects most people, regardless of bioethnic background or skin color. Skin may either appear lighter, or darker than normal, or lack … Meer weergeven Web17 jan. 2024 · Skin. Skin is the human body's largest organ. Body organs aren't all internal like the brain or the heart. There's one we wear on the outside. Skin is our largest organ—adults carry some 8 ...
Dark skin - Wikipedia
Web14 jan. 2024 · Human skin color can range from almost black to nearly colorless (appearing pinkish white due to the blood in the skin) in different people. Note: The above text is excerpted from the Wikipedia... Web11 aug. 2024 · Early studies of human diversity showed that most genetic diversity was found between individuals rather than between populations or continents and that variation in human diversity is best described by geographic gradients, or clines. A wide-ranging study published in 2004 found that 87.6% percent of the total modern human genetic diversity … chivette clothing
The Biology of . . . Skin Color Discover Magazine
Web11 aug. 2024 · The latest research indicates that the genes controlling white skin colour arose relatively recently in Europeans – as recently as 8,000 years ago. Given Ireland’s relatively remote northerly location, it’s likely that most invaders and settlers to the island have been northern white Europeans, concentrating these genes even further. WebSkin 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, … Web13 mei 2014 · A person’s skin color is determined by the amount of melanin in their skin. Melanin is a dark brown to black pigment made by special cells called melanocytes. Melanin ’s purpose is to help the body function … chivetta chicken barbecue events