Question

If a woman who is colorblind marries a man with normal vision, what is the probability of their son being colorblind? *

0%
50%
100%

Answer 1

The chances that the first child from this marriage is a color-blind boy is 25%

Of all the girls (this means we assume the child's sex is no longer an issue of probability), we have a 50% chance that they be color-blind.

Of all the children (sex unspecified), there is a 50% chance of having normal visio