Is this not an easy bio question?

[HdK]

Advertisement - Members don't see this ad

A colorblind man marries a normal woman. if they have children, what is the probability that their son will be colorblind?

The answer is 0%, because i guess they assume the "normal" woman to be XAXA..

I said 50% because you dont know if the "normal" woman is a carrier or not. So I guess my question is if they say normal..does that not mean phenotypically normal? You can disregard carrier then?

 

[helloworld9]

In general, they will tell you whether she's a carrier or not. If they say she's "Normal" then you can assume she's clear and free of colorblindness. She would donate both of her XX and the male would give the Y's so you would get 100% healthy boys or 0% colorblind!