Now, in part A, what is the probability that the child is colorblind? In part, what is the probability that the child is male and colorblind? In Part C, if the child is female, what is the probability that she is normal? And in Part D, if the couple has two children, what is the probability that both of them are normal? Now, before we actually examine A through D, let's determine what the genotype is of each one of our parents. So let's begin with the heterozygous normal female.