All Blue-Eyed People Have A Single Ancestor In Common

(Business Insider) All blue-eyed people have a single ancestor in common

The mutation was found on an entirely different gene called HERC2. HERC2 turns off OCA2, meaning it turns off the brown and reveals the blue. Every blue-eyed person has this exact same mutation.

How did this mutation get its start? Possibly when humans migrated from Africa to Europe. This would explain why only people of European descent have blue eyes. It would also suggest that all blue-eyed people share a single European ancestor.

Now, that’s an impressive family tree!

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