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Originally Posted by Muta
This just sounds much easier said, than actually proven.
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This is actually addressed here:
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Originally Posted by Claeren
I see where they are coming from, but wouldn't you have to test each family line to establish that they follow the same route to blue eyes and that no one in their own family tree just had that same (yet unique) blue eye mutation?
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The way I understand it is the chances of the same mutation occurring in the same place twice in two different populations is so very remote that the assumption is that it didn't and that they're related. So in theory yes it could be the same mutation occurring in different populations at the same time, but I think they have ways of determining if that was the case.
No expert in genetics though by any stretch.