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21 April, 02:52

During which phase of meiosis does crossing over of chromosomes occur?

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  1. 21 April, 03:02
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    -During pachytene stage of prophase I.

    Explanation:

    Crossing over can be defined as the process of exchange of genetic material of a cell between two homologous, non-sister chromatids. It results in formation of recombinant chromosomes and causes variations in offspring.

    Crossing over takes place during phachytene stage of prophase I of meiosis, during which homologous chromosomes come close by synapis and exchange the genetic material.

    Thus, the correct answer is 'pachytene stage of prophase I.'
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