Question: In fruit flies, red eyes are dominant over sepia eyes. A male with red eyes is crossed with a female with sepia eyes producing first generation offspring that all had sepia eyes. What does this indicate about the flies that were crossed?

  Options: 
 A. Both parents are homozygous for the trait.
 B. Both parents are heterozygous for the trait.
 C. The male is heterozygous and the female is homozygous recessive for the trait.
 D. The male is homozygous dominant and the female is heterozygous for the trait.
Answer: C