So me and my friends were talking a couple of days ago. My friend told me her sisters baby came out with blue eyes, but this is were I got confused, because my friend had dark brown eyes, and her husband had blue, so I thought brown eyes over rule blue eyes, so either way if the woman has blue eyes or the man, your child is still going to have dark brown eyes? Or does it have to deal with the grandparents? because the husbands parents both have blue eyes, but the wife's mother has hazel and the husband has brown. so now I am very confused?
Most Helpful Guy
The brown gene (B) is dominant over the blue gene (b), so to have blue eyes, your genotype (both genes together) would have to be (bb). People with brown eyes can have either (BB) or (Bb) as a genotype. So the father had (Bb) and the mother had (bb). the dad carried the blue gene, but it disnt show because brown is dominant over blue. So his (b) gene crosses with one of mom's (b) genes to make (bb). Blue1