Which of the following is an example of a post-zygotic isolation mechanism?

Allopatric Speciation

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Gamete incompatibility

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Hybrid sterility

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Polyploidy

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Solution

The correct option is B Hybrid sterility
Formation of hybrid or a progeny is a post zygotic event. Post zygotic isolation mechanism includes formation of sterile offsprings, hybrid inviability and hybrid breakdown
So, the correct answer is 'Hybrid sterility'

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