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Yes, only prophase 1 of meiosis. Crossing over occurs when homologous pairs of chromosomes (tetrads) line up in prophase I. In prophase II there are no tetrads left, only sister chromatids, so there is nothing there to recombine with.

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11y ago
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14y ago

Crossing over occurs in the pachytene stage of prophase 1. Although the effects of crossing over only become visible in the next stage, which is known as diplonema.

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Q: Does crossing over occur during prophase 1?
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