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DeCS
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Descriptor English:
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Crossing Over, Genetic
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Descriptor Spanish:
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entrecruzamiento genético
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Descriptor Portuguese:
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Troca Genética
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Synonyms English:
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Crossing Over
Crossing Overs
Crossing-Over, Genetic
Genetic Crossing Over
Genetic Crossing-Over
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Tree Number:
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G05.728.615.200
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Definition English:
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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. |
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Indexing Annotation English:
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do not confuse with CROSSES, GENETIC, the result of breeding 2 varieties of the same species
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See Related English:
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Chromosome Pairing
Pachytene Stage
Sister Chromatid Exchange
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History Note English:
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2005(1968)
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Allowable Qualifiers English:
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Record Number:
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3451
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Unique Identifier:
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D003434
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Occurrence in VHL:
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Similar:
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DeCS
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