In which stage of the first meiotic division two sister chromatids are formed?

Leptotene

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Zygotene

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Pachytene

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Diplotene

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Solution

The correct option is B Pachytene
The pachytene stage is characterized by the formation of recombination nodules in presence of enzymes known as recombinase. The recombination nodules help the homologous chromosomes, to exchange their genetic material or chromatid segments by a process known as crossing over.
So, the correct answer is option C.

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