Biology / Bio 1719 · Atom · ~20 seconds
Gametic Isolation
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Gametic isolation is a prezygotic barrier in which two species' egg and sperm cells are incompatible, so fertilization fails even after mating occurs.
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Sperm from one species failing to bind or fuse with eggs from a related species is a gametic barrier acting after mating.
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Gametic isolation can act even after successful mating — mating without fertilization still counts as prezygotic failure.
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