Canadian Medical Guide > Biological Sciences > Genetic Processes > Recombination, Genetic > Crossing Over (Genetics) Terms and Definitions

Crossing Over (Genetics)

Medical Definition:	The reciprocal exchange of segments at corresponding positions along pairs of homologous chromosomes by symmetrical breakage and crosswise rejoining.
Guide Notes:	= interchange of genes or segments between homologous chromosomes; do not confuse with CROSSES, GENETIC, the result of breeding 2 varieties of the same species; DF: CROSSING OVER
Previously Indexed:	Cytogenetics (1967),Genetics (1966-1967)

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