The stage characterized by the appearance of recombination nodule is–

Zygotene

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Pachytene

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Leptotene

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Diplotene

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Solution

The correct option is B Pachytene
In the pachytene stage of prophase I, the non-sister chromatids of the homologous chromosomes cross-over and exchange of genetic material takes place. Recombination nodules are the sites at which the non-sister chromatids cross-over.
So, the correct answer is Pachytene.

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