When Female Fruit Flies Mate with Two Different Males on the Same

Multiple Choice

When female fruit flies mate with two different males on the same day,

A) the first male's sperm fertilizes all of the eggs.
B) the first male's sperm fertilizes most of the eggs.
C) the second male's sperm fertilizes most of the eggs.
D) the first and second males fertilize equal numbers of eggs.
E) none of the eggs become fertilized.