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05/09/2020 7:08 pm
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Assertion: During zygotene, chromosomes show bivalent stage.
Reason: Bivalent is half the number of chromosomes.
(a) If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.
(b) If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion.
(c) If Assertion is correct but Reason is incorrect.
(d) If both the Assertion and Reason are incorrect.
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05/09/2020 7:09 pm
(b) If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion.
Explanation:
During zygotene, because of the pairing of the homologues, the nucleus contains half the number of chromosomes. Each unit is a bivalent composed of two homologous chromosomes.