DNA is 'written eyewitness history'. Careful reading, combined with some careful thinking about chance events allows us to conclude that all (studied) blue-eyed folks share the same mutation... from the same ancestor.
Taken from my Spring 2014 MCB184 class; references appear in the Powerpoint/Keynote in the next image.The .mp4 Lecture #1 has a summary of preceding pH work.
Lecture #1 or shorter .mov
Lecture #2
If you have trouble viewing, please shoot me an e-mail
References embedded