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CROSSING OVER, GENETIC
Descriptors Found:
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DeCS
Descriptor
English
:
Crossing Over, Genetic
Descriptor
Spanish
:
Intercambio Genético
Descriptor
Portuguese
:
Troca Genética
Tree Number:
G05.355.760.210
Definition
English
:
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.
Indexing Annotation
English
:
do not confuse with CROSSES, GENETIC, the result of
breeding
2 varieties of the same species; DF: CROSSING OVER
See Related
English
:
Chromosome Pairing
Pachytene Stage
Sister Chromatid Exchange
History Note
English
:
2005(1968)
Allowable Qualifiers
English
:
DE
drug effects
ES
ethics
GE
genetics
IM
immunology
PH
physiology
RE
radiation effects
Record Number:
3451
Unique Identifier:
D003434
Occurrence in VHL
:
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DeCS
CID-10
SciELO
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