Types of Zygotic Barriers

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8 Terms

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Habitat isolation

Species live in different habitats and don’t meet to mate.

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Temporal isolation

Species breed at different times so they don’t mate.

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Behavioral isolation

Species have different courtship behaviors that prevent attraction.

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Mechanical isolation

Differences in reproductive structures prevent mating.

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Gametic isolation

Sperm and egg are incompatible

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Hybrid inviability

Fertilized egg doesn’t develop or the offspring dies early.

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Hybrid sterility

Hybrid is healthy but can’t reproduce.

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Hybrid breakdown

Hybrids can reproduce but later generations are weak or infertile.