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Concept information

Genetic Phenomena > Recombination, Genetic > Homologous Recombination > Crossing Over, Genetic

Preferred term

Crossing Over, Genetic  

Type

  • mesh:Descriptor

Definition

  • The reciprocal exchange of segments at corresponding positions along pairs of homologous CHROMOSOMES by symmetrical breakage and crosswise rejoining forming cross-over sites (HOLLIDAY JUNCTIONS) that are resolved during CHROMOSOME SEGREGATION. Crossing-over typically occurs during MEIOSIS but it may also occur in the absence of meiosis, for example, with bacterial chromosomes, organelle chromosomes, or somatic cell nuclear chromosomes.

Broader concept

Related concepts

Synonym(s)

  • Crossing Over
  • Crossing-Over, Genetic

Allowable Qualifier(s)

In other languages

  • Crossing-over

    French

  • Enjambement (génétique)
  • Enjambement chromosomique

URI

http://data.loterre.fr/ark:/67375/JVR-BG7H9CC2-R

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