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Crossing Over, Genetic MeSH Descriptor Data 2024


MeSH Heading
Crossing Over, Genetic
Tree Number(s)
G05.728.615.200
Unique ID
D003434
RDF Unique Identifier
http://id.nlm.nih.gov/mesh/D003434
Annotation
do not confuse with CROSSES, GENETIC, the result of breeding 2 varieties of the same species
Scope Note
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.
Entry Version
CROSSING OVER GENET
Entry Term(s)
Crossing Over
Crossing-Over, Genetic
Previous Indexing
Cytogenetics (1967)
Genetics (1966-1967)
See Also
Chromosome Pairing
Pachytene Stage
Sister Chromatid Exchange
Public MeSH Note
2005; see CROSSING OVER (GENETICS) 1968-2004
History Note
2005(1968)
Date Established
1968/01/01
Date of Entry
1999/01/01
Revision Date
2016/06/17
Crossing Over, Genetic Preferred
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