Sister Chromatid Exchange

An exchange of segments between the sister chromatids of a chromosome, either between the sister chromatids of a meiotic tetrad or between the sister chromatids of a duplicated somatic chromosome. Its frequency is increased by ultraviolet and ionizing radiation and other mutagenic agents and is particularly high in BLOOM SYNDROME.

Year introduced: 1985(1980)

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Tree Number(s): G05.728.615.750

MeSH Unique ID: D012854

Entry Terms:

• Chromatid Exchange, Sister
• Chromatid Exchanges, Sister
• Exchange, Sister Chromatid
• Exchanges, Sister Chromatid
• Sister Chromatid Exchanges

Previous Indexing:

• Chromatids (1968-1979)
• Chromosome Aberrations (1968-1979)
• Crossing Over (Genetics) (1968-1979)
• Cytogenetics (1967)
• Genetics (1966)

See Also:

• Crossing Over, Genetic

All MeSH Categories
Phenomena and Processes Category
Genetic Phenomena
Recombination, Genetic
Homologous Recombination
Sister Chromatid Exchange