Reproductive Isolation Is Reinforced When Diverging Species Come into Contact
- Prezygotic isolating mechanisms prevent hybridization; postzygotic isolating mechanisms reduce the fitness of hybrids.
- Postzygotic isolating mechanisms lead to reinforcement of prezygotic isolating mechanisms by natural selection. Review Figure 17.9, Figure 17.10, and Figure 17.12
- Hybrid zones may persist between species with incomplete reproductive isolation. Review Figure 17.13
See ACTIVITY 17.1 for a concept review of this chapter.
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