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  1. Oxford Dictionary

    crossing over

    • n.
      the exchange of genes between homologous chromosomes, resulting in a mixture of parental characteristics in offspring.

    • noun: crossing over

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    crossing over

    • IPA[ˌkrôsiNG ˈōvər]
    • n.
      the exchange of genes between homologous chromosomes, resulting in a mixture of parental ...

    Oxford American Dictionary