PREZYGOTIC isolating mechanisms ensure that: * no mating has occurred (sperm is not able to fertilize the egg)

hybrids are not fertile

hybrids are more likely to survive

genes do not mutate and affect the entire population

the father in the first generation probably had the recessive colorblind trait in his x chromosome. if he and his wife both had the colorblind trait, even if she had 1 recessive and 1 dominant, then that trait would be passed on to their kids.

(since you didn't attach the family tree this is just an assumption)

i think the answer is 95 hope this