作者检测了赣州地区32例正常人外周血淋巴细胞姐妹染色单体交换频率,其均值为7.83±0.81(X±SD/细胞),变异范围为6.40～9.50/细胞,男女之间无显著差异。经分组分析,A组均值为2.26±0.37,B组为1.00±0.19,C组为3.39±0.45,D组为0.50±0.22,E组为0.35±0.13,F组为0.20±0.08,G组为0.12±0.03。平均每号染色体姐妹染色单体交换所占百分比以A组为最高,B组次之,C、D、E、F、G组依次排列,提示姐妹染色单体交换在染色体上为随机分布,并不频发于某一组染色体。 The authors examined the sister chromatid exchange frequency of peripheral blood lymphocytes from 32 healthy controls in Ganzhou, with an average of 7.83 ± 0.81 (X ± SD / cell), ranging from 6.40 to 9.50 per cell, with no significant differences between men and women. According to group analysis, the mean of group A was 2.26 ± 0.37, group B was 1.00 ± 0.19, group C was 3.39 ± 0.45, group D was 0.50 ± 0.22, group E was 0.35 ± 0.13, group F was 0.20 ± 0.08, group G was 0.12 ± 0.03. The average percentage of sister chromatid exchange per chromosome was highest in group A, followed by group B, followed by groups C, D, E, F and G, suggesting that the sister chromatid exchanges were randomly distributed on chromosomes and Not frequent in a group of chromosomes.