染色线,染色''.'丝'.''染色单体的中间''.'丝'.''状体螺旋盘绕在排成一列的染色粒上.

The spirally coiled central filament of a chromatid along which the chromomeres are aligned.

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.

应用外周全血淋巴细胞培养方法检测慢性酒精中毒患者淋巴细胞姐妹染色单体交换率.

METHODSTo determine the sister chromatid exchanges SCE of chronic alcoholism patients by peripheral blood culture.

不久前，一直认为姐妹染色单体内聚力只在DNA合成的复制点产生。

Until recently, it was generally assumed that sister- chromatid cohesion can only be generated at replication forks where DNA is synthesized.

这时每条染色体已是由两条染色单体构成了。

Then each chromosome is formed by the two chromatids .

在分裂后期,纤维开始变短, 染色单体分离.

During anaphase the fibers begin to shorten , and the chromatids begin to move apart.

在粗线期每条染色体实际已由两条染色单体组成。

Each chromosome in pachytene actually have been composed of two chromatids.

交换:同源染色单体之间形成交叉时遗传物质的交换现象.

Crossing over The exchange of material between homologous chromatids by the formation of chiasmata.

此期可以看清，联会的两条染色体都分别由两条染色单体组成。

This period can see, the Federation of the two chromosomes are formed by two chromatids .

随着染色体的复制, 着丝粒始终连接着形成的两个染色单体.

Following the replication of chromosomes, resultant chromatids remain attached at the centromere.