Answer:
D
Step-by-step explanation:
Because the male is a homozygous dominant fly, he has NN, and no matter what the female fly has, their offspring will have at least one dominant genotype from the male (N). If the female has NN, all of the offspring will have NN, if she has Nn, half of the offspring will have NN and the other half will have Nn, if she has nn, all of their offspring will have Nn. Hope this helped a little!