Crossing over occurs during

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(C) Crossing over occurs during the $Pachytene$ (also known as the thick thread or $Pachynema$) substage of $Prophase-I$ of meiosis.During this stage,

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Pachytene

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(C) Crossing over occurs during the $Pachytene$ (also known as the thick thread or $Pachynema$) substage of $Prophase-I$ of meiosis.During this stage, an exchange of genetic material between non-sister chromatids of homologous chromosomes takes place.This process is mediated by the enzyme recombinase and results in genetic recombination.

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