July 20, 2024

Athens News

News in English from Greece

New study reveals mutation that gave humanity blue eyes 10,000 years ago


New research sheds light on the origins of people with blue eyes. According to a recent study, if you have two blue eyes, you are a descendant of one person, and this genetic mutation came from one person who lived between 6,000 and 10,000 years ago.

For years, teams of researchers have worked to uncover the truth behind this development by studying the OCA2 gene, which determines the level of brown pigment in the human eye.

But it turns out that the genetic mutation that causes blue eyes in people actually comes from an entirely different gene called HERC2. That is, nature completely deactivates OCA2, thereby turning brown into blue.

How do we know that all people are related to a common ancestor? The reason is that people with blue eyes have the exact same mutation. Study author Professor Hans Eiberg told Science Daily: “Green-eyed people can be explained by the fact that they have a reduced amount of melanin in the iris, which is very different from blue-eyed people. From this we can conclude that all blue-eyed people are related to the same ancestor “They all inherited the same switch in the same place in their DNA.”



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