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(B) The $Pachytene$ stage is the third stage of $Prophase-I$ in meiosis.During this stage,the bivalent chromosomes clearly appear as tetrads.It is cha

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Appearance of recombination nodules

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(B) The $Pachytene$ stage is the third stage of $Prophase-I$ in meiosis.During this stage,the bivalent chromosomes clearly appear as tetrads.It is characterized by the appearance of recombination nodules,which are the sites at which crossing over occurs between non-sister chromatids of the homologous chromosomes.Crossing over is the exchange of genetic material between two homologous chromosomes,leading to genetic recombination.

Which of the following is a characteristic of the $Pachytene$ stage?

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