Question

In fruit flies, the allele for ebony body color is recessive to the allele for brown body color. In a generation of fruit flies with 103 offspring, 51 males and 52 females had ebony bodies. Which of the following is the best conclusion you can make about the parents of this generation?
a. One parent was heterozygous for body color and the other was homozygous with a brown body.

b. One parent had an ebony body and the other was heterozygous for body color.

c. Both parents were heterozygous for body color.

d. Both parents were homozygous with ebony bodies.

Answer 1

Your answer is D. Both parents would be homozygous ebony because is the trait is recessive, ex: (Hh) h being the recessive trait. But since there's a big H, then the recessive trait will not show and the dominant will. So in order for all the offspring to be ebony which is the recessive trait, then both the parents would have to be homozygous for the recessive trait. So there's would be (hh) 

This is hard to explain but i hope this helped you :)

Answer 2

The correct answer is D. Both parents were homozygous with ebony bodies.

This is because there is a trait which is recessive. In H trait the dominant recessive will be seen.

Both parents should be homozygous if the trait for the offsprings wants to be ebony.