When a pair of homologous chromosomes (bivale | vedclass

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(D) bivalent is a pair of homologous chromosomes formed during the $Zygotene$ stage of $Prophase-I$ of meiosis.Each chromosome in the pair consists of

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$Both (b) and (c)$

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(D) bivalent is a pair of homologous chromosomes formed during the $Zygotene$ stage of $Prophase-I$ of meiosis.Each chromosome in the pair consists of two sister chromatids.Since a bivalent consists of two homologous chromosomes,and each chromosome has two chromatids,the total number of chromatids in a bivalent is $2 	imes 2 = 4$.These four chromatids are collectively referred to as a tetrad.Therefore,a bivalent consists of two chromosomes,each having two chromatids,resulting in a total of four chromatids.

When a pair of homologous chromosomes (bivalent) is formed,it consists of:

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