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Science

Why do people have brown eyes?

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The brown color comes from melanin, the same pigment that colors the skin and makes a suntan. People with other colors of eyes generally lack melanin or have only small amounts.

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Eye color is directly related to the amount of melanin in the front layers of the iris. People with brown eyes have a large amount of melanin in the iris, while people with blue eyes have much less of this pigment. A particular region on chromosome 15 plays a major role in eye color.

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