From the East to the West within the eye of an Eurasian

[bob]

He knows there are blue eyed kids in his family tree so he "could" know whether or not the parents were mixed or not. I say "could" because while you always know who the mother is you don't always know who the father is. Some aboriginee people reckon lineage matrilineally for precisely that reason. In annonymous questionaires something like ten (maybe twenty) percent of mothers will admit to parenting a child with someone other than their spouse.

[Mr He]

I don't know the particulars of all that, however they all look very Asian in her family, even the person with one blue and one brown eye.

Any mixing must have happened a long time ago, and my wife would not know the details.

[headhonchoII]

The one brown and one blue is almost certainly a somatic mutation, means a non-inherited mutation in the body's cells after the embryo's cells started dividing, most likely one brown gene got turned off allowing the blue to show through. You can see the same thing in some dogs and cats.