posted on Feb, 2 2010 @ 03:47 AM
As far the genetics of it go:
The reason or causation of the first "supposed" blue eyed humans is up to interpretation and or guess work.
Under current knowledge, you can have blue eyes if one of your parents has blue eyes, one with brown eyes, but the brown eyed parent must have some
trace amounts of blue eyed genetic material.
For example, my mother has gray-blue eyes, my father has brown eyes. Both of his parents have brown eyes, and their parents had one blue eyed relative
on each side.
I wound up with gray-blue eyes with yellow rings around the pupils and a rather large brown dot in my right eye. Its right up against the pupil and
actually makes my pupil look kind of like a goat eye in certain light.
Under those studies, they posited that blue-blue eyes were original, and that gray-blue eyes are "newer". They also say that green eyes came around
some time between brown and blue.
For my own personal enjoyment, one of the articles said that they tested 800 patients with blue eyes. All had very similar genetics, except one, the
one with a brown dot in the eye.
Seeing as how my Dad's side of the family went back 3 generations of "dominant" brown eyes, id cautiously suggest this may be "blue-eyed"
genetics saying F-U to brown eyes and becoming dominant, or at least equal, by incorporating a wee bit of the dominator.