Genetics: Analysis and Principles 5th Edition by Robert Brooker

Exercise 50

Suppose that a gene affects the anterior morphology in house flies and is inherited as a maternal effect gene. The gene exists in a normal allele, H , and a recessive allele, h , which causes a small head. A female fly with a normal head is mated to a true-breeding male with a small head. All of the offspring have small heads. What are the genotypes of the mother and offspring Explain your answer.