A man has blond hair both of his parents have black hair he marries a woman with blond hair her father has blond hair and her mother has black hair they have a child with blond hair.explain?

Answer 1

It can't be. The blue eyes gene is recessive! to have blue eyes you must get the TWO RECESSIVE gens from your parents: aa .

brown eyes gene is dominant (AA or Aa). So if the two parents have blue eyes, their children, their children will be blue eyed as well. aa and aa can't create Aa or AA.

Answer 2

You don't necessarily inherit every trait that a parent has. For instance, most men have considerably smaller breasts than their mothers. You normally inherit 23 pairs of chromosomes from your parents. If we simplify things - hair color is NOT found on a single gene - we could posit that the father and mother have both a dominant gene (dark hair) and a recessive gene (light hair) for hair color. That means you could inherit two dominant genes and have dark hair, one dominant and one recessive gene and have dark hair, or two recessive genes and have light hair. But as i said, there's more than one gene involved. Some people have black hair, some have dark brown hair, some have light brown hair, some have dark blonde hair, some have light blonde hair, and some are various shades of red. Your hair doesn't change the same color. Many people are born with really light blonde hair which darkens to a light brown by about age six, medium brown hair as a young adult, and gray hair as an older adult. Some especially lucky ones actually reach the stage where their hair is invisible, although in this case, their hair often turns dark, coarse, and migrates to their ears and their noses. Further confusing the issue is hair color. My current wife is a blonde from the neck up; I've never seen her any other way, although her roots are a really attractive brunette color. I previously was married to a woman who had really flat brown hair, instead of having any variation from hair to hair. It was turning prematurely gray, and she didn't like that. (I would have preferred gray streaks, but I was smart enough to keep my mouth shut.) And then, of course, there's the obvious explanation: the milkman. A man might have all the suspicions in the world, but if he's smart, he'll keep his mouth shut. You marry a woman hoping to make her happy, and if it takes a little assistance from the local dairy to do that, well, a beautiful baby is a pretty nice thing to have, you know? They're all gifts from God.