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All blue-eyed people on Earth share the same ancestor


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Scientists have worked out that, long long ago, all humans had brown eyes. Until a specific gene mutation caused them to change.

The mutation comes from a gene called HERC2. Scientists say it switches off OCA2, another gene that regulates the amount of brown pigment that develops in the eye.

It’s believed the first person to have blue eyes lived in Europe up to 10,00 years ago. And every blue-eyed person alive today has that same mutation present in their body.


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