question_answer

A geneticist mixed together many different kinds of fruit flies-some with long wings, some with short wings, some with red eyes, some with .brown eyes, and so on. He allowed the flies to feed, mate randomly, and reproduce by the millions. After many generations, most of the flies in the population had medium wings and red eyes, and most of the extreme types had disappeared. This experiment appears to demonstrate:         

A) Stabilising selection

B) Geographic variation

C) Diversifying selection

D) Genetic drift