Table 1.

Spontaneous chromosomal aberrations

GenotypeNo. of abberationsaTotal % of cells withb:
Chromosome typeChromatid type
BreaksGapsBreaksGapsBreaks + gapsBreaks
Wild type0.250.250.251.252 ± 0.70.5 ± 0.5
rad51c 066.73.316 ± 36.7 ± 2.1
rad51d 148.710639 ± 524 ± 4.0
xrcc2 09.36.75.321 ± 46.7 ± 2.1
xrcc3 2.710.76.7626 ± 49.4 ± 2.5
  • a Data are the numbers of aberrations per 100 cells. At least 150 mitotic cells were analyzed for each genotype. Total aberrations per cell and standard errors were calculated as described previously (60).

  • b Data are means ± standard errors.