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

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The altered gene order seen in some individuals is a result of chromosomal inversion, where a segment of the chromosome has undergone a breakage and reattachment in an inverted orientation. In this case, the segment containing the genes Bobbed, forked, and vermillion has inverted relative to the wild-type order.

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