Biological genetic problems in senior high school. After reading the answer, I still don't understand asking for advice. Why do you use multiplication in calculation? Is it a kind of mathematics?
There are two possibilities for this problem, 1. When the wife is aa, the probability of them having brown eyes is 100%, and the probability of having blue eyes is 0%. When the wife is AA, their chances of having blue eyes are 50%. There are four possibilities for each possibility, adding up to eight, so there are only two possibilities for having blue eyes, so the total possibility is * * *.