how does DNA determine a person's eye color??

Answer 1

DNA determines eye color like this:

Brown eyes are almost always dominant (although sometimes they're not and we don't know why) Hazel is usually included in with brown. Hazel is less dominant than brown but more dominant than blue and green.
Blue eyes are next in dominance
Green eyes are last in dominance

You get two alleles that judge which color eyes you will get. For example, if you have brown eyes, you could have:

brown/brown
brown/blue
brown/green

because brown is dominant.

You get one allele from each parent. If your parent has brown eyes, they could have one brown allele and either one green or one blue allele. They could give you any of the three.
If your parent has blue eyes, they have either two blue alleles or one blue and one green. They only give you one allele.
If your parent has green eyes, they have green alleles. they will only give you one green allele.

so, Even if you and your mate have brown eyes, you could still have a blue-eyed child!

Answer 2

Nobody actually knows the real answer to this question.

To REALLY understand this we would need to be able to take any given set of DNA and be able to create from that an image of what that person looks like and what all of their characteristics are without ever physically seeing that person.

We can not do that today so.....

We don't actually know HOW DNA determines a person's eye color. We only know that it does, and we know what the likely outcome of the combination of two peoples DNA will be on the eye color of their offspring.

But we really have no idea HOW

When we do know how the world will be quite a different place.

Answer 3

It determines eye color the same way it determines any other trait.

Next?

Answer 4

this will explain and let you play with different color combos
http://www.athro.com/evo/gen/genefr2.html

Answer 5

the genes...