Mutation of a specific gene in the modern fruit fly results

Mutation of a specific gene in the modern fruit fly results in the fly gaining o pair of wings and resembling its evolutionary ancestor what is the best conclusion that can be inferred? An existing mutation changed the wings of the evolutionary ancestor to become halteres instead. The mutation changed the structural proteins that are encoded in the modern fruit fly\'s genome to more resemble those of the evolutionary ancestor. The mutation of the gene induced the synthesis of new genes encoding the extra pair of wings. The genetic information encoding the presence of the extra per of wings exists in the modern fruit fly but is regulated than in the evolutionary ancestor

Solution

A defect in a gene can cause change in particular building plan of a body part. Here in the case of drosophila the gene responsible for coding the synthesis of wings also get mutated in that way so that it is now coding for new pair of wings resembling its ancestor.