Campbell Problem 14

Molecular Genetics Problem 14

14. In Drosophila, the gene for white eyes and the gene that produces “hairy” wings have both been mapped to the same chromosome and have a crossover frequency of 1.5%. A geneticist doing some crosses involving these two mutant characteristics noticed that in a particular stock of flies, these two genes assorted independently; that is they behaved as though they were on different chromosomes. What explanation can you offer for this observation?

One possibility is that a translocation has occurred where a segment of chromosome containing only one of the 2 genes has moved to a different chromosome.