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9 terms

Prezygotic and Postzygotic Barriers

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prezygotic barrier
prevent mating or fertilization between different species
postzygotic barrier
reproductive barrier that operates should interspecies mating occur and form hybrid zygotes
temporal isolation
prezygotic barrier; when different species reproduce at different times
habitat isolation
prezygotic barrier; the species remain isolated because they breed in different habitats.
behavioral isolation
prezygotic barrier; the species have differences in mating rituals
mechanic isolation
prezygotic barrier; the species are physically unable to reproduce
hybrid inviability
postzygotic barrier; the offspring (called a hybrid) does not survive
hybrid sterility
postzygotic barrier; the hybrid is infertile
hybrid breakdown
postzygotic barrier; the first-generation hybrids are viable and fertile, but when they mate the offspring are feeble and sterile