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Chromosomal aberrations after ionizing radiation. (A) Chromosome-type aberrations occur when breaks and rejoinings change both sister chromatids at one locus. (B) Chromatid-type aberrations occur when breaks and rejoinings alter only one sister chromatid at any one locus. To see this illustration in color, the reader is referred to the web version of this article at www.liebertpub.com/ars
