The several hundred species of picture-winged fruit flies of the Hawaiian Islands are genetically very similar,yet they all differ markedly from their ancestral population in Asia.This is probably an example of ________

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The fact that the Hawaiian picture-winged fruit flies differ from their ancestral population in Asia suggests that a small subset of the original population colonized the Hawaiian Islands and their genetic makeup has diverged from the original population due to random genetic drift. This is an example of the founder effect.

The Several Hundred Species of Picture-Winged Fruit Flies of the Hawaiian