Ole Blue Eyes

Author: James Braithwaite

If you have blue eyes (like myself) you may find the following interesting.

A University of Copenhagen team has identified the gene which around 6-10,000 years ago underwent a genetic mutation in one individual who eventually gave rise to all blue-eyed people.

The proof that all blue-eyed people have a common ancestor comes from the fact that whereas eye colours ranging from brown to green are caused by relatively large differences in the amount of melanin in the iris, controlled by “considerable individual variation” in the area of the DNA responsible for melanin production, the variation in iris melanin levels across all blue-eyed individuals is very small.

“From this we can conclude that all blue-eyed individuals are linked to the same ancestor. They have all inherited the same switch at exactly the same spot in their DNA.”
Professor Eiberg from the Department of Cellular and Molecular Medicine

Source: http://www.theregister.co.uk/2008/02/01/blue_eyes_mutation/