crossing over or cross·ing-o·ver (krô s ng-  v r, kr sng-)n. The exchange of genetic material between homologous chromosomes that occurs during meiosis and contributes to genetic variability. |
| crossing over or crossing-over (krôsng-vr) The exchange of genetic material between homologous chromosomes that occurs during meiosis and contributes to genetic variability. |
ThesaurusLegend: Synonyms Related Words Antonyms
| Noun | 1. |  crossing over - the interchange of sections between pairing homologous chromosomes during the prophase of meiosisdiplotene - the fourth stage of the prophase of meiosis biological process, organic process - a process occurring in living organisms |
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