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- During mitosis, sister chromatids remain joined by their centromere until anaphase. 在有丝分裂期间,姐妹染色单体在分裂后期之前都是通过着丝点连接的。
- The sister chromatid exchanged (SCE) frequency among infertile men increased in different degrees (P<0.05). 男性不育者的姐妹染色单体交换率有不同程度的增高(P<0.;05)。
- The failure of paired chromosomes or sister chromatids to separate and go to different cells during meiosis. (染色体的)不分开,不分离在减数分裂过程中,成对的染色体或同型的染色单体不分离到不同的细胞中。
- Finally, spindle fibers pull the homologues apart. This leaves the sister chromatids intact. 最后,同源染色全在纺锤体的牵引下分开。这保证了姐妹染色单体的完好无损。
- As a result, each chromosome in a postreplicative cell contains two identical DNA molecules, the sister chromatids. 因此,在细胞分裂中期,每条染色体都有一条和它自己一样的另外一条染色体,两条相同的染色体叫做姐妹染色体。
- The standard practice is to call the entire structure a chromosome and each of its strands a sister chromatid. 标准的做法是把整个结构称为一个染色体,而把它的各条称为姐妹染色单体。
- Study on the impact of trinitrotoluene on sister chromatid exchange of Mocaca mullatta peripheral blood lymphocyte. 三硝基甲苯对恒河猴外周血淋巴细胞姐妹染色单体互换的影响。
- During diakinesis the sister chromatids of homologous pairs of chromosomes complete their separation, and the chromosomes coil tightly, shortening and thickening. 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。
- Not surprisingly, cohesion is normally established when sister chromatids are synthesized during S phase of the cell division cycle (see the figure). 当然,内聚力通常存在于细胞分裂S期,也就是染色单体形成的时候。
- Methods:The sister chromatid exchange (SCE) test in mice spermatogonia was used in the study. 方法:采用小鼠精原细胞姐妹染色单体交换实验。
- In this case, large amounts of cohesin are recruited to the damaged DNA, forming new connections between the sister chromatids (7, 9). 在这种情况下,由于DNA被损伤,大量的内聚力就产生了,在姐妹染色单体间形成新的连接(7,9)。
- In leptotene the chromosomes,already replicated, start to codense and appear as fine threads, althouge sister chromatids are not yet distinct. 在细线期,染色体已复制,开始浓缩,呈现出明显的丝状,尽管姐妹染色单体还未分开。
- Next, during anaphase, the two sister chromatids of each chromosome split, and one from each pair is drawn toward each pole of the cell. 在分裂后期,两个姊妹单体分离,分别拽向细胞两极。
- During anaphase II the centromeres divide and single chromatids are drawn toward the poles, thus sister chromatids are separated. 在减数分裂后期II,每条染色体的两个染色单体随着着丝点的分裂而彼此分开,由纺锤丝牵向两极。
- The standard practice is to call the entire structure a chromosome and each of its strands a sister chromatid . 标准的做法是把整个结构称为一个染色体,而把它的各条称为姐妹染色单体。
- To investigate the incidence of sister chromatid exchange ( SCE ) and its influencing factors. 探讨影响姐妹染色单体互换(SCE)频率的因素。
- Objective: To study the changes of sister chromatid exchange(SCE) rate in the mutator cell of tumor cell and mutagenized by drug or teratogen. 目的:了解在肿瘤细胞中、一些药物、致畸物引起的突变细胞中姐妹染色单体交换(SCE)率的变化。
- And also did the rate of chromosome aberrance(CA),sister chromatid exchange(SCE) and micronuclie cell (MC) of peripheral blood(P>0.05). 接触组外周血淋巴细胞染色体畸变率(CA)、姐妹染色单体互换率(SCE)、微核率(MC)与对照组比较;差异均无统计学意义(P>0.;05)。
- Methods: Sister chromatid exchange(SCE) freqency was determined in human lymphocytes and plant root tip cells after treatments with pesticides. 方法 :测定蚕豆、大麦根尖细胞和人外周血淋巴细胞姐妹染色单体交换 (SCE)率。