: MeSH: Sister Chromatid Exchange

Genetic Phenomena > Recombination, Genetic > Homologous Recombination > Sister Chromatid Exchange

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.

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