About eye color and genetics?

Can two brown eyed people have a blue eyed child? If so, how does it work? Does it mean that all of the grandparents have blue eyes or half of the grandparents? Or even 1 grandparent? Is it even possible?





I don't remember how the square works!About eye color and genetics?
If I remember correctly:





It is possible for 2 brown eyed people to have a child with blue or green eyes. But both parents must have the recessive gene (brown is dominant, blue/green is recessive)





That would mean that the grand parents must also have at least the recessive gene to get kids with blue/green eyes.





But for 2 brown eyed people, the chance of having a child with blue/green eyes is 1 in 4 for each child.About eye color and genetics?
yes.





It's ok, genetics are a funny thing. :) Brown is dominant, meaning it is more likely to appear in offspring. If one of the parents has a blue-eyed parent somewhere in their family tree, then they are Bb on that square - they carry the gene for blue eyes, it just isn't expressed in them. It means that one of the grandparents probably has blue eyes, or a blue mutation (I think green is the blue mutation).





It's totally possible. Hopefully I'm explaining this and it makes sense....








I gave you the link to punnet squares on wikipedia, it's got a good pic. :)
basically, the parents could have the recessive gene from their parents and pass it down to their children. They may not have blue eyes, but it's definitely possible that their children could have blue eyes.
Anything is possible. Although brown tends to be the dominate gene.