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Pre-zygotic reproductive barriers are distinguishable from post-zygotic reproductive barriers in that
they occur in the parent generation, preventing mating attempts or fertilization, while post-zygotic barriers occur in the offspring generation.
they occur in the offspring generation, preventing continued reproduction through reduced vitality or sterility, while post-zygotic barriers occur in the parent generation.
they keep different species separate, while post-zygotic reproductive barriers encourage hybridization.
they rely only on behavioral mechanisms, while post-zygotic reproductive barriers rely on mechanical incompatibility.