In Wild Type Drosophila Melanogaster, the Order of Genes on a Chromosome

In wild type Drosophila melanogaster, the order of genes on a chromosome is yellow, vermillion, forked, and Bobbed.Some of the flies have a different gene order: yellow, Bobbed, forked, and vermillion.The flies with the altered gene order most likely have a

A) missense mutation.
B) nonsense mutation.
C) reciprocal translocation.
D) frame-shift mutation.
E) chromosomal inversion.