Hawthorn maggot flies that breed on native hawthorns or introduced European apples can mate in the lab,but rarely mate in the wild.This is an example of ____ reproductive isolation.

Question

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The fact that hawthorn maggot flies that breed on different host plants (native hawthorns or introduced European apples) rarely mate in the wild suggests that some form of prezygotic reproductive isolation is occurring. This means that there are barriers to reproduction that prevent mating from taking place in the first place, rather than barriers that occur after mating has occurred (which would be postzygotic). Allopatric and sympatric refer to geographic isolation, which is not a factor in this case. Outgroup is not relevant to the concept of reproductive isolation.

Hawthorn Maggot Flies That Breed on Native Hawthorns or Introduced