着丝点是染色体的主缢痕，在这个地方姐妹染色单体连在一起。
Centromere is the primary constriction on the chromosome, a region at which the sister chromatids are held together.
方法：采用小鼠精原细胞姐妹染色单体交换实验。
Methods: the sister chromatid exchange (SCE) test in mice spermatogonia was used in the study.
探讨影响姐妹染色单体互换(SCE)频率的因素。
To investigate the incidence of sister chromatid exchange (SCE) and its influencing factors.
方法：蚕豆、大麦和人外周淋巴细胞姐妹染色单体交换（SCE）。
Methods:Sister chromatid exchange(SCE) was sued in human lymphocytes and plant root tip cells.
作者应用外周血姐妹染色单体交换率(SCE)技术估价多菌灵a的致突变作用。
The authors used technique of sister chromosome exchange (SCE) to assess the effect on mutation with BCMA.
染色体的主缢痕，使姐妹染色单体连在一起，在其两侧各有一个由蛋白构成的动粒。
Centromere --- The primary constriction on the chromosome, a region at which the sister chromatids are held together and at which the kinetochore is formed.
结论体外姐妹染色单体互换试验可推荐作为一项检测口腔材料潜在致突变性的体外评价方法。
Conclusion it is recommended that sister chromatid exchange test is an effective in vitro detecting method for mutagenicity of dental materials.
在终变期配对的同源染色体中的姐妹染色单体完成分离，染色体变成紧密凝集的状态，缩至最小长度。
During diakinesis the sister chromatids of homologous pairs of chromosomes complete their separation and the chromosomes coil tightly shortening and thickening.
本文对饮酒组28例、对照组22例的外周血淋巴细胞姐妹染色单体互换、核仁形成区和随体联合进行了观察、统计。
The paper makes an observation and statistical study of 28 cases in drinking group and 22 cases in control group with peripheric blood of lymphatic sister chromatid exchanges (SCE).
采用孕妇外周血淋巴细胞姐妹染色单体交换（SCE）技术，检测巨细胞病毒（CMV）抗体阳性孕妇淋巴细胞DNA损伤和修复。
We applied the sister chromatid exchange (SCE) technique to pregnant women with antibodies against cytomegalovirus (CMV) positive, to detect the lesion and repair of DNA in the lymphocytes.
结果64%的卵细胞核型正常，36%的卵细胞为非整倍体，其中22%为同源染色体不分离，14%为姐妹染色单体非平衡性过早分离。
Results 64% of oocytes were normal, 36% of oocytes were aneuploidy, of which 22% were due to nondisjunction and 14% unbalanced predivision.
目的与方法：单细胞凝胶电泳技术(SCGE)、姐妹染色单体交换法(SCE)和染色体畸变分析法均能被用来检测dna的损伤或修复。
Purpose and methods: Single cell gel electrophoresis (SCGE), sister chromatid exchanges (SCE), chromosome aberrations are three methods to determine DNA damage and repair.
赭曲毒素A通过诱导DNA链的断裂、姐妹染色单体的互换、DNA加合物的形成或者活性氧发挥作用，但是作为一种毒素其作用机制仍然没有被解决。
Ochratoxin a may act by induction of DNA strand breaks, sister chromatid exchanges, DNA adduct formation, or reactive oxygen but the mechanism of action as a toxin is not yet resolved.
赭曲毒素A通过诱导DNA链的断裂、姐妹染色单体的互换、DNA加合物的形成或者活性氧发挥作用，但是作为一种毒素其作用机制仍然没有被解决。
Ochratoxin a may act by induction of DNA strand breaks, sister chromatid exchanges, DNA adduct formation, or reactive oxygen but the mechanism of action as a toxin is not yet resolved.
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