My parents have brown eyes and mine are blue; Why? And I am not adopted.?

Question

Only one of my grandparents have blue eyes.

Answer 1

The gene for blue eye colour is recessive (ie weaker than the brown, dominant one). So your parents will have inherited a brown gene and a blue gene each; by the luck of the draw, you both both blue genes, giving you blue eyes.

If you inherited a brown gene (from either parent) and a blue gene (from the other) you would have brown eyes.

Answer 2

Every person has two genes that determine eye color. Brown is a dominant gene, so your parents eyes look brown even though they have one brown and one blue gene. Each of your parents must have given you his and her blue gene when you were conceived. Couples like your parents have a 1 in 4 chance of having a child with blue eyes.

Also, one of your brown eyed grandparents much have had a blue recessive gene and that is how his or her child got it.

It would be easier to explain if I could draw a chart.

Answer 3

This is a trick of whats called 'Mendelian genetics'.
You have two genes for eye colour, one from your mother, one from your father.
You got blue eyed genes from both of them.
Your parents both have one blue eyed gene and one brown eyed genes.
Blue genes are whats called 'recessive' meaning that you need two to have blue eyes.
Brown genes are whats called 'dominant' meaning if you've got just one, then you've got brown eyes.
At least one of your grandparents on each side must have had at least one blue eyed gene too. Note though, that therefore even if all of your grandparents had brown eyes, you might still have blue eyes.

Answer 4

It's pretty well accepted that there are two pairs of alleles (two genes) for eye color. In order to have blue eyes, you have to have "blue" for all four alleles. In order to have brown eyes, your parents only needed to have "brown" for one allele. So you can easily get "blue" from each parent.

Just for the record, my parents both had brown eyes, and 3 of the 5 kids in the family have blue eyes.

Answer 5

Dominate and recessive traits in your family's genetics.

Brown eyes dominates over one of your parent's genes, hiding the blue-eye traits, this was later shown in your genetic makeup.

Other reasons why you may have blue eyes is due to melanin deficiency, the stuff that gives you dark colors - black silky hair, hazel eyes, brown skin.

Answer 6

Hi -

We all come from an ancient ancestor thousands of years ago.

So, are DNA is thousands of years old. Passed down from generation, to generation, are DNA is all the same, but genetics, and heredity, are mostly the same.

So, just because someones parents are mentally ill, does not mean that all their children will be, etc. etc.

Chances are, that your grandpas grandpas grandpas grandpa had blue eyes, or somewhere along the line.

So, in a nutshell - although you may have adopted many traits of your parents, your body probably adopted the blue eyes from one of your ancestors, since your DNA is the same.

Answer 7

Your genetic make up is different, you must not have the dominant gene.

Answer 8

it the trait. u will understand more when you take biology