can two parents with blue eyes have a baby with brown eyes?

Answer 1

The answer is basically no they can't. Overall eye color is polygenic, but it is possible to make statistically valid generalizations about eye color. Parents with blue eyes generally can ONLY have children with blue eyes (or colors associated with blue). Each person has two genes that control basic eye color. Additional genes can alter the expressed color- for example in a person with green or grey eyes. Because blue genes are recessive, having even a single brown gene usually gives you brown eyes (as brown is dominant). In order to have blue eyes both genes must be blue.

Brown gene + brown gene = brown eyes
Brown gene + blue gene = brown eyes
Blue gene + brown gene = brown eyes
Blue gene + blue gene = blue eyes

So if parent A has blue eyes, they MUST have two blue genes:

Blue and Blue

Only one of your genes is passed on to your children (and the other is from your partner), but regardless of which gene is actually passed on, the only available gene is "blue" in a blue-eyed person. If your partner also has blue eyes, they also contribute one gene to the child, but if they have blue eyes, they can only pass on blue genes.

2 parents with brown eyes can have children with brown OR blue eyes, depending on their genotype.

2 parents with blue eyes will always have blue eyed children.

One parent with blue eyes and one parent with brown eyes can have brown or blue eyed children, depending on the genotype of the brown eyed parent (whether they are brown-brown or blue-brown).

If one of the parents has the brown-brown genotype, then their children will invariably have brown eyes.

If either parent has blue eyes, then they will always have atleast on blue gene, even if their phenotype is brown eyes (because they always get a blue gene from parents with blue eyes).

Answer 2

I agree with AshletD. Not possible. One parent needs to have the dominant (brown) gene to pass on. For blue eyes, you do not have the dominant gene.

But two brown eyed parents can have blue eyed kids. I do :)

Answer 3

Of course, I know a couple with a baby who was born with red hair and light green eyes and both the parents had dark hair and eyes Its the gene's, or a native american and the child has blonde hair blue eyes the gene's can carry you way back

Answer 4

Back in the day, in school, we were taught that even though two parents have blue eyes, they can have a brown eyed child. Brown eye color is a dominant. I believe that one of the grandparents would have brown eyes.
I was taught that it was possible.

Answer 5

Yes, I have green eyes, my husband brown, and a daughter with blue. My dad had blue my mom hazel, my sister brown, my brother blue, and mine green. Most likely the children take after one of the parents, brown is the most dominate, but they could have completely different color as well. Same with hair color. My cousin had 4 kids by the same man (her husband) they both had dark brown hair, one kid had blond, 2 were brown, and one a red head.

Answer 6

Of course they can. The parents obviously are carrying the gene for brown eyes, and brown eyes are dominant.

Answer 7

I always thought the answer was no....because neither parent would have a dominant eye color gene to pass on. I would really like to ask a genetics specialist this question and get a definitive answer.

Answer 8

Sure. Brown eyes are dominant. However, if all four grandparents and all eight great grandparents were blue eyed, then I'd be suspicious of an outside sperm donor if I had a brown eyed child!

Answer 9

Yes, if one of the grandparents had brown eyes. I know a kid who looks exactly like his dad, but has almost black eyes, and his dad has blue.

Answer 10

Yes. It is very recessive but it can happen. Blue eyes is a recessive trait, but if anyone in your family has brown eyes which is dominant it is very likely.