One of the most interesting things researchers have uncovered about eye color is that blue eyes are the result of a single mutation to the OCA2 gene that turns off its ability to produce brown eyes. In general, brown eyes are more dominant and blue more recessive, but blue-eyed parents will sometimes still have a brown-eyed child. Because multiple genes are involved, you can’t always predict a baby’s eye color. The color of our eyes is determined by multiple different genes, most notably OCA2 and HERC2. Babies are often born with blue eyes, but the color changes as the melanin develops in their irises over time. Another rare possibility is heterochromia, or having two different eye colors. There are many slight variations in each of these colors, and sometimes more unusual colors will appear, such as amber, gray, and, in people with albinism, pale pinkish-blue. In northern Europe, nearly everyone has blue eyes, but that number drops dramatically everywhere else, to the point where blue eyes are practically nonexistent in South America, Asia, and Africa. The exact statistics of human eye color are hard to pin down, but in general, brown eyes (whether light or dark) are by far the most common across the world. In this post, we’re just going to focus on the color, because it’s a lot more complicated than you might expect! How Common Is Your Eye Color? The color, the shape, the expression, the eyelashes and eyebrows. One of the first things we notice about someone when we meet them is their eyes.
Percentage of blue eyes in america archive#
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