Assertion :Nondisjunction is the failure of paired chromosomes to segregate during the Anaphase of meiotic division of gametogenesis. Reason: Non-disjunction results in production of abnormal gametes.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
Non-disjunction means that a pair of homologous chromosomes has failed to separate at anaphase so that both chromosomes of the pair pass to the same daughter cell that leads to form a abnormal gametes.
For example - Klinefelter syndrome is a trisomy genetic disorder in males caused by the presence of one or more X chromosomes.
So,option A is correct.

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