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crossing overor cross·ing-o·ver (krô′sĭng-ō′vər, krŏs′ĭng-)
The exchange of genetic material between homologous chromosomes that occurs during meiosis and contributes to genetic variability.
(Genetics) biology the interchange of sections between pairing homologous chromosomes during the diplotene stage of meiosis. It results in the rearrangement of genes and produces variation in the inherited characteristics of the offspring. See also linkage4
the exchange of segments of chromatids between pairs of chromosomes during meiosis, resulting in a recombination of linked genes.