Crossing over occurs at the . . . . . . sta | vedclass

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(C) Crossing over is the exchange of genetic material between non-sister chromatids of homologous chromosomes. It occurs during the $Pachytene$ stage

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Pachytene

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(C) Crossing over is the exchange of genetic material between non-sister chromatids of homologous chromosomes. It occurs during the $Pachytene$ stage of $Prophase-I$ of $Meiosis-I$. During this stage,the bivalent chromosomes are clearly visible as tetrads,and the process of recombination is mediated by the enzyme recombinase.

Crossing over occurs at the . . . . . . stage.

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