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  • Diagram showing chromosomes crossing over.
    Rights: The University of Waikato Te Whare Wānanga o Waikato Published 28 June 2011 Size: 44 KB Referencing Hub media

    During meiosis, homologous chromosomes (1 from each parent) pair along their lengths. The chromosomes cross over at points called chiasma. At each chiasma, the chromosomes break and rejoin, trading some of their genes. This recombination results in genetic variation.

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