How do dominant and recessive genes affect eye color?

For example, if both parents have the dominant brown allele, it is likely your child will have brown eyes and the same if one parent has a dominant brown allele and the other a recessive blue allele. Brown and green alleles will always out-rule blue alleles, with brown being the most dominant.

Can a green eyed and brown eyed parent have a blue eyed baby?

A lot. A brown eyed dad and a green eyed mom can have a blue eyed child because there are at least two eye color genes. Because of this, it is possible for both green and brown eyed parents to be carriers for blue eyes. And as carriers, they each can pass down blue eye genes to their children.

How do eye color genes work?

The chromosomes a child inherits carry genetic information that determines eye color. Differences in the copies received from each parent causes variations in the amount of melanin produced. A region on chromosome 15 has a big part in determining eye color. The OCA2 and HERC2 genes are located in this region.

How do you determine your dominant eye color?

What dominant means is if at least 1 of your two copies is brown, then you will have brown eyes. The way geneticists represent these two different versions of this eye color gene are B for brown and b for blue (the capital letter is always the dominant, the lowercase, the recessive).

How do I know if I have a recessive blue eye gene?

Another way to tell if a trait is recessive is if both parents and all their kids share that same trait. In our case here, both parents have brown eyes but they had a blue-eyed child. So this follows the first pattern meaning blue eyes are recessive. The same would be true for blonde hair.

How do you know if you have dominant or recessive genes?

The way people write out dominant and recessive traits is the dominant one gets a capital letter and the recessive one a lower case letter. So for eye color, brown is B and blue is b. As I said above, people have two versions of each gene so you can be BB, Bb, or bb–BB and Bb have brown eyes, bb, blue eyes.

How do I know if I carry the recessive blue eye gene?