For 241 I see it like this: what is the probability that their (Bill and Ann) first child (so 100 percent they're having a kid, we don't know gender yet) will be a normal (probability 1, he could be color blind or not) and a boy (probability 2, the child could be a boy or girl). So we have to multiply 2 probabilities.

For 242: I woman marries a man. What is the probability that the couple's son (they had a baby boy, 100 percent. they "already have the son" so it definitely cant be a girl) will have hemophilia (Only probability of the question)? IF the question was rewritten as "What is the probability that the couple will have a son that will have hemophilia?" then we would also consider the gender probability.

Hope this helps!