Crossing over occurs between

Sister chromatids

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Non-sister chromatids

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Centromeres

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None of the above

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Solution

The correct option is D Non-sister chromatids
Crossing over is the exchange of genetic material between non-sister chromatids of homologous chromosomes during meiosis. It takes place at pachytene stage of the prophase 1.
So, the correct option is 'Non-sister chromatids'.

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