#iheartgenetics

[yennoodle]

#Repost #sciencenerd #iheartgenetics A photo for a book project in evolution... The color of human #eyes is not dictated by a single gen many it of the other traits. It is instead considered a polygenic trait, meaning there are several different genes on various chromosomes that carry information about what eye color an individual should possess. These genes, when expressed, then blend together to make various shades of different colors. Relaxed selection for dark eye color also allowed more mutations to take hold. This created even more alleles available to combine together in the gene pool to create different eye colors. #Sexualselection may also explain some of the different eye colors that have popped up over time. Mating, in humans, tends to be non-random and as a species, we are able to choose our mates based on desirable characteristics. Some individuals may find one eye color much more appealing over another and choose a mate with that color of eyes. Then, those genes are passed down to their offspring and continue to be available in the gene pool. @robertclarkphot