Common Ancestor 6-10,000 Years Ago For All Blue-eyed People

Posted on January 30, 2008  Comments (1)

Blue-eyed humans have a single, common ancestor

“Originally, we all had brown eyes”, said Professor Eiberg from the Department of Cellular and Molecular Medicine. “But a genetic mutation affecting the OCA2 gene in our chromosomes resulted in the creation of a “switch”, which literally “turned off” the ability to produce brown eyes”. The OCA2 gene codes for the so-called P protein, which is involved in the production of melanin, the pigment that gives colour to our hair, eyes and skin. The “switch”, which is located in the gene adjacent to OCA2 does not, however, turn off the gene entirely, but rather limits its action to reducing the production of melanin in the iris – effectively “diluting” brown eyes to blue.

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One Response to “Common Ancestor 6-10,000 Years Ago For All Blue-eyed People”

  1. SoundGirl
    January 31st, 2008 @ 3:02 pm

    Some very interesting information. I am fascinated with science and I love the tid bits on this site.
    I dig the cats, too!

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