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Genetic mutation makes brown eyes blue

  2. AshleyWard
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People with blue eyes have a single, common ancestor, according to new research.

A team of scientists has tracked down a genetic mutation that leads to blue eyes. The mutation occurred between 6,000 and 10,000 years ago, so before then, there were no blue eyes.
AshleyWard

4 responses // Genetic mutation makes brown eyes blue

  • http://youtube.com/watch?v=F5JNtxeJLQ4
    Felt like the appropriate time for: Don't it make my brown eyes blue
    Swiyyah
  • That's interesting!
    ILiveonaClock
  • what about green eyes?
    KasiaC
  • Melanin switch
    The mutation is what regulates the OCA2 switch for melanin production. And depending on the amount of melanin in the iris, a person can end up with eye color ranging from brown to green. Brown-eyed individuals have considerable individual variation in the area of their DNA that controls melanin production. But they found that blue-eyed individuals only have a small degree of variation in the amount of melanin in their eyes.

    "Out of 800 persons we have only found one person which didn't fit — but his eye color was blue with a single brown spot," Eiberg told LiveScience, referring to the finding that blue-eyed individuals all had the same sequence of DNA linked with melanin production
    jade_azul16

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