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J2Thurst J2Thurst
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7 years ago
Why do we expect that postzygotic isolation will evolutionarily precede prezygotic isolation in the speciation process?
 
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7 years ago
Postzygotic isolation is fitness-reducing in that mating effort is wasted on offspring that have low survivorship or fecundity. Natural selection should act to reduce this waste by favoring, for example, mate recognition signals or spatial or temporal partitioning that prevent such matings in the first place.
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