Genetics: Analysis and Principles 5th Edition by Robert Brooker

Exercise 45

A cytogeneticist has collected tissue samples from members of the same butterfly species. Some of the butterflies were located in Canada, and others were found in Mexico. Upon karyotyping, the cytogeneticist discovered that chromosome 5 of the Canadian butterflies had a large inversion compared with the Mexican butterflies. The Canadian butterflies were inversion homozygotes, whereas the Mexican butterflies had two normal copies of chromosome 5
a. Explain whether a mating between the Canadian and Mexican butterflies would produce phenotypically normal offspring
b. Explain whether the offspring of a cross between Canadian and Mexican butterflies would be fertile.