Sister Chromatid Exchange |
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| Chromatid Exchange, Sister; Chromatid Exchanges, Sister; Exchange, Sister Chromatid; Exchanges, Sister Chromatid; Sister Chromatid Exchanges | |
| 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. | |