What other traits are likely to be controlled by multiple genes? 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. « on: 11/09/2008 10:06:56 » Wells, Catherine asked the Naked Scientists: Hi, I understand about dominant and recessive genes in such things as eye colour, but was wondering how it is that if a black and a white person have … 2003). Using a simplified example of a polygenetic trait controlled by only three genes, this becomes easier to visualize. Recessive 2. 1989; Toyooka et al. The long answer has to do with the parts of your DNA that give specific instructions for one small part of you. For example, collagen, which forms the basic structure of your skin and gives it strength, is a protein. Most people associate Africans with dark skin. Examples of Polygenic Inheritance 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. All hair, skin, and eye colors come from these pigments. If skin color were inherited in a simple dominant or recessive pattern, like seed color in pea plants. Most evidence indicates that skin color is controlled by how many gene pairs? It turns out that there isn’t just one or even a few genes involved in skin color. Skin, eye, and hair color 3. What would be the genotypes of dark-skinned parents that could produce fair-skinned children? 3 to 4 ____ apply to multifactorial traits but may be difficult to follow because different genes contribute in … People have two color pigments, eumelanin, which is brown/black, and pheomelanin which is reddish. Study participants were also interviewed, and had their weight and height logged, while skin colour was measured using a device called a reflectometer . A couple can have a baby with a skin color that isn’t between their own. In other words, your genes. INTRODUCTION. The long answer, though, is much more interesting. New gene variants reveal the evolution of human skin color. 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. By Ann Gibbons Oct. 12, 2017 , 2:00 PM. Eumelanin comes in two forms, brown and black. So is melanin, which is the pigment that gives your skin its color. 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 1. 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