My adopted sister has dark brown hair and hazel eyes and is a quarter black (think that's correct way of saying). Her husband has almost black hair, dark brown eyes and looks very foreign in his appearance. they have 2 children, one looks an exact mix of them both and the other is complete opposite, blonde hair and blue eyes. I have always wondered if this is possible or could my nephew have a different father?
It is possible for 2 brown eyed people to have blue eyed children as brown eyes are dominant genes and blue eyes are recessive (i.e. hiding away in the background.
It is not possible for 2 blue eyed people to have a brown eyed child as they would have inherited only the recessive blue eye gene and have no brown gene at all or they would have brown eyes. Their children, therefore could only inherit the blue eye gene.
My sister has brown hair and eyes and her boyfriend is portugeuse and very dark skin, hair and eyes. My nephew is very white (like me, my son and brother) and has blue eyes