In which stage does crossing over occur?

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

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Pachytene

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(A) 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 become clearly visible as tetrads,and the phenomenon of recombination is mediated by the enzyme recombinase.

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