The genetics of hazel eyes is not clear yet and has received little research attention. Recent studies have discovered that the bey2 gene is actually the OCA2 gene. The bey2 and gey genes are names of theoretical genes on chromosome 15 that helps explain some of the genetics of eyes colors. Considering these two genes, and the fact that people have two copies of a gene one from mom and one from dad, then we have the following possibilities for various eye colors:īrown eyes (BB bb, BB Gb, BB GG, Bb bb, Bb Gb, Bb GG) One form of gey makes some melanin (G) while the other makes only a little (b). One form of bey2 makes lots of melanin (and is usually referred to as B) while the other form makes only a little (b). Two genes, bey2 and gey, work together to make brown, green, or blue eyes. Brown eyes have a lot of melanin in the iris, green eyes have less, and blue eyes have little or no pigment. Brown, green and blue eye color comes from a pigment called melanin.
There are also some unusual eye colors such as red and violet. There is a variety of colors and shades in between. The most common color of eyes is brown and the least common green. To learn more about the subject, read about how genetics affect eye color. In the image to the right, you can see the darker inner ring surrounded by a lighter outer ring. Characteristics of Hazel EyesĪ large percentage of hazel eyes have a brown ring around the iris, and either green or blue coloring around the outside of the ring. In North America, “hazel” is a term used to describe eyes that appear to change color, ranging from light brown to green and even gray, depending on lighting in the environment. For some, hazel eyes range from a light brown to a medium golden-green.
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