posted by Anonymous .
A brown-eyed man marries a blue-eyed woman and they have eight children, all with brown eyes. Can you be sure whether the man is homozygous or heterozygous for eye color?
If heterozygous, the probability of all 8 getting the dominant gene by chance = .5^8 = .004
Although I cannot be absolutely sure, I would reject the heterozygous hypothesis at the P ≤ .01 Level.