Smart News Keeping you current Genetic Study Shows Skin Color Is Only Skin Deep Genes for both light and dark pigmentation have been in the human gene pool for at least 900,000 years For example, collagen, which forms the basic structure of your skin and gives it strength, is a protein. If skin color were inherited in a simple dominant or recessive pattern, like seed color in pea plants. How is skin colour controlled by genes? So is melanin, which is the pigment that gives your skin its color. 2003). Genes have a significant influence on skin because skin is made of so many proteins. Examples of Polygenic Inheritance Skin Color. Study participants were also interviewed, and had their weight and height logged, while skin colour was measured using a device called a reflectometer . Using a simplified example of a polygenetic trait controlled by only three genes, this becomes easier to visualize. Eumelanin comes in two forms, brown and black. 1989; Toyooka et al. All hair, skin, and eye colors come from these pigments. Most people associate Africans with dark skin. New gene variants reveal the evolution of human skin color. Most evidence indicates that skin color is controlled by how many gene pairs? 3 to 4 ____ apply to multifactorial traits but may be difficult to follow because different genes contribute in … What other traits are likely to be controlled by multiple genes? By Ann Gibbons Oct. 12, 2017 , 2:00 PM. In other words, more genes are having an influence over skin pigmentation, and only about 10 percent of these genes have previously been linked to changes in skin colour. It turns out that there isn’t just one or even a few genes involved in skin color. The pigment melanin is responsible for dark coloration in the skin and there are at least three genes, which control for human skin color. In both cases, understanding the genetic architecture of human skin color is likely to provide a greater appreciation of underlying biological mechanisms, much in the same way that mutational hotspots in the gene TP53 have helped to educate society about the risks of tobacco (Takahashi et al. People have two color pigments, eumelanin, which is brown/black, and pheomelanin which is reddish. 1. In other words, your genes. The long answer, though, is much more interesting. Skin, eye, and hair color 3. What would be the genotypes of dark-skinned parents that could produce fair-skinned children? The long answer has to do with the parts of your DNA that give specific instructions for one small part of you. Recessive 2. 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