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.

DUI

D012854 MeSH Browser

CUI

M0019906

Previous indexing

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

History note

85(80); was see under CROSSING OVER (GENETICS) 1980-84

Public note

85; was see under CROSSING OVER (GENETICS) 1980-84