Can 2 blueyed people produce a brown eyed baby?

Answer 1

By Mendelian theory, no. (bb= blue, BB & Bb=brown)
Blue eyes are a recessive trait
bb x bb = only bb
Now if they were Brown eyed with the blue recessive trait and a blue eyed spouse
Bb x bb = Bb Bb bb bb

-----------BUT---------------------

Most of us learned the model for determining eye color that G.C. Davenport and C.B. Davenport devised in 1907. The Davenport model wrongly says brown eye color is always dominant over blue eye color, which means that two blue-eyed parents always have blue-eyed kids. We know better now.

"Although not common, two blue-eyed parents can produce children with brown eyes," says Richard A. Sturm, a Principal Research Fellow at the Institute for Molecular Bioscience at the University of Queensland in Brisbane, Australia.

Eye color is a complex trait that depends on the state of several interacting genes. The gene that usually decides the issue (blue eyes or brown eyes) is the OCA2 gene on chromosome 15. But it comes in different strengths. A person with a weak form of the OCA2 gene will have blue eyes. Likewise a person with a strong form will have brown eyes.

The plot thickens, though, because an individual also has other eye-color genes that each has a say in the final eye-color outcome. For example, if one of these lesser genes is strong, it can make the weak form (blue) of OCA2 work much more effectively — almost like the strong form (brown). Then the eye color may be a light brown or muddy grey. In fact, the resulting color can be any shade of brown, hazel/green, or blue depending on the strengths of the interactions.

So, yes... two blue eyed parents can produce a brown eyed baby.

Answer 2

They could, but it would be VERY unlikely. Blue is a recessive gene, both parents have to have it to produce a blue-eyed child. Since the brown eye gene is the dominant, if either parent has it, the child will at least have hazel, probably brown eyes. If somewhere in the lineage there is a stray brown eye gene on either parents' side, it could happen.

XY chromosomes have nothing to do with eye color - just the sex of the baby.

Two brown eyed people could produce a blue eyed baby. All that is needed is a blue eye gene from both parents to get together (about a 25% chance)

Answer 3

The misconception that two blue eyed people cannot have a brown eyed baby is based on studies done in 1907. But based on new information, the answer is YES!
The factors that determine eye color are much more complicated than originally believed. (I wonder how many divorces have occurred through the years because of this?)
Here is a source that explains a little more thoroughly.

Answer 4

Yes, but it's not likely.

It was once believed that there was one single gene for eye color, and that blue was recessive to brown. Therefore if you had one copy for blue and one for brown, your eyes would be brown. Also, two blue eyed-parents could not produce a brown-eyed child but two brown eyed parents that both carried a copy of the recessive blue gene could produce a blue-eyed baby (25% chance).

More recently, it has been discovered more recently, however, that eye color (similar to many other physical traits) is predicted by not just one gene, but many, and therefore it is very difficult to predict a baby's eye color based on the parents' eye color without knowing the parents' genotype at all of the genes that contribute to eye color.

Answer 5

Yes but 2 brown eyed people cannot have a blue eyed baby.

Answer 6

Yes, it's called a recessive gene. If anyone else on your family's history had different color eyes than blue, then yes. But, it's most likely the baby will have blue eyes. And all these other people are wrong, they are just trying to give an answer, this is the truth.

Answer 7

This is kind of hard to explain. Let's say the mother has alleles Bb, and the father has alleles Bb. Becuase 'B' is dominant both parents will have blue eyes. The child will take one allele from each parent so children could turn out to be:
BB, Bb, bb.

The double 'bb' would produce brown-eyed children, while 'BB' and 'Bb' would give blue-eyed children.

Answer 8

I think its possible but there is a way to figure this out - Think of two blue eyed people you know that have a child and look at it that way.
My mom has green eyes and my dad has brown and I have brownish hazel. It works in weird ways but genetically I think there is a way of finding it out. All babys are born with blue eyes though :)

Answer 9

Check the site I have given you. Maybe it will help you. My husbands eyes are brown and so are mine. We have a Dark brown eyed boy, blue eyed girl and blue eyed baby boy... God Bless.

Answer 10

Nope. Genetics. the gene that produces brown eyes is dominant, while the gene that produces blue eyes is recessive. So, if you have brown eyes, you can still carry the gene for blue eyes, but not the other way around.