According to a study published in 2008, everyone with blue eyes has one ancestor from about 7,000 years ago who was born somewhere in the black sea region with the blue eye genetic mutation.
“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.” says Professor Hans Eiberg from the Department of Cellular and Molecular Medicine at the University of Copenhagen states.
Professor Eiberg has been studying this phenomenon since 1996 and has traveled to Turkey, Jordan and Denmark to study the blue eye color and trace it back to its origins. Through his study of DNA, the professor discovered the originating location for the blue eyed gene.
The OCA2 gene, programmed to produce melanin responsible for hair, skin and eye color, is actually inhibited, which causes blue eyes instead of simply being void of melanin at all. When there is no melanin, people experience albino characteristics.
So the blue eye color came from a very precise variance in the OCA2 gene, and this variance originally happened in just one ancestor. But even though blue eyes came from a genetic mutation, there is no indication that blue eyes has to do with health or our performance in life. This gene plays no role in our ability to survive.