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Assertion: During zygotene, chromosmes show bivalent stage.
Reason: Bivalent is half the number of chromosomes
A. If both assertion `&` Reason are True `&` the Reason is a corrrect explanation of the Asserion.
B. If both Assertion `&` Reason are True but Reason is not correct explanation of the Assertion.
C. If Assertion is Trie but the Reason is False.
D. If both Assertion `&` Reason are false

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Correct Answer - b
During zygotene, because of the paring of the homologous, the nucleus contains half the number of chromosmes. Each unit is a bivalent composed of two homologous chromosomers.

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