Females of the beetle species Tribolium castaneum can readily mate with T. freemani. If these females mate with males of both their own species and males of T. freemani, nearly all of their offspring are pure species T. castaneum with very few hybrids. This occurs because the sperm of T. castaneum blocks the sperm of T. freemani within the reproductive tract of the T. castaneum female. This is an example of _______ isolation, a form of _______ isolation.

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The Answer of Females of the beetle species Tribolium castaneum can readily mate with T. freemani. If these females mate with males of both their own species and males of T. freemani, nearly all of their offspring are pure species T. castaneum with very few hybrids. This occurs because the sperm of T. castaneum blocks the sperm of T. freemani within the reproductive tract of the T. castaneum female. This is an example of _______ isolation, a form of _______ isolation.

Females of the Beetle Species Tribolium Castaneum Can Readily Mate