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New research shows that people with blue eyes have a single, common ancestor.
Originally, we all had brown eyes, but a genetic mutation that took place 6-10,000 years ago resulted in the creation of a "switch" that turned off the ability to produce brown eyes.
Variation in the color of the eyes from brown to green depends on the amount of melanin in the iris. Blue-eyed people all have about the same of amount of melanin in their eyes, while the amount of melanin in brown-eyed people varies greatly. "From this we can conclude that all blue-eyed individuals are linked to the same ancestor," says a member of the University of Copenhagen team that announced this finding. "They have all inherited the same switch at exactly the same spot in their DNA."
- Science Daily
"Blue-eyed Humans Have A Single, Common Ancestor," Jan. 31, 2008.
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Last updated by curious on Aug. 25, 2008
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