Essential Genetics 6th Edition by Daniel Hartl

Exercise 4

In Drosophila melanogaster , the genes for brown eyes ( bw ) and humpy thorax ( hy ) are about 12 map units distant on the same arm of chromosome 2. A paracentric inversion spans about one-third of this region but does not include the genes mentioned. Explain what recombinant frequency between bw and hy you would expect in females that are:
(a) Homozygous for the inversion.
(b) Heterozygous for the inversion.