Don't it make your Brown eyes Blue

[Unabashed]

If two people, one with blue eyes, one with brown eyes had children which eye colour would be more dominant? Meaning which colour is more likely?

[Kit]

Difficult to say. Brown eyes and brown hair are dominant, but my brown-eyed, brown-haired brother and blue-eyed, blonde sister in law have 2 blue-eyed kids who are practically white blonde. Depends on the mix of genes further back in the family - there are blue eyes and blonde hair in my grandparents' generation, although my parents and all 3 of us kids have brown eyes and brown hair. And no, my brother's milkman is not blue-eyed or blond!

[5029]

Everyone has 2 genes making up eye colour, each of these may be either blue or brown. Each parent gives one of these to their child, so the child will have two as well. The brown gene is dominant over the blue one, so if they have one of each, they will have brown eyes.

In answer to your question, the parent with blue eyes will pass on a blue gene (as they don't have any brown ones), and the parent with the brown eyes must have one brown, but the other one could be either. Therefore it depends what the second parent gives to the child as to what colour the child's eyes are.

Hope this makes it a bit clearer - A Level Biology!!!