When offspring are infertile after breeding occurs between individuals of different species, the genetic identities of the two populations are protected by:

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Hybrid infertility is a post-zygotic barrier that prevents the offspring of two different species from producing viable, fertile offspring. This helps protect the genetic identity of the two populations involved by preventing the mixture of their genetic material. The other choices (mechanical incompatibility, temporal isolation, behavioral isolation, and genetic isolation) are pre-zygotic barriers that prevent successful mating or fertilization between individuals of different species, but they do not necessarily guarantee that the genetic identities of the populations are protected.

When Offspring Are Infertile After Breeding Occurs Between Individuals of Different