Assertion : During zygotene,chromosomes show | vedclass

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(A) During the zygotene stage of Prophase-$I$ of meiosis,homologous chromosomes undergo pairing,a process known as synapsis.Each pair of homologous ch

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If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.

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(A) During the zygotene stage of Prophase-$I$ of meiosis,homologous chromosomes undergo pairing,a process known as synapsis.Each pair of homologous chromosomes is referred to as a bivalent or a tetrad.Because the homologous chromosomes pair up,the number of observable units (bivalents) is half the original diploid number of chromosomes $(2n)$.Therefore,the Assertion is correct as chromosomes appear as bivalents,and the Reason is also correct as it accurately describes the numerical reduction of observable chromosomal units during this stage.

Assertion : During zygotene,chromosomes show bivalent stage.
Reason : Bivalent is half the number of chromosomes.

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Assertion : During zygotene,chromosomes show bivalent stage.Reason : Bivalent is half the number of chromosomes.