| 1. | Each chromosome consists of two chromatids held together by the centromere .
每个染色体由两个染色单体所组成，它们被一个着丝点联结在一起。
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| 2. | 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。
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| 3. | At anaphase the dicentric chromatid will form a bridge and the acentric a fragment, both of which can be scored .
在后期双着绿点染色体将形成一个桥，无着绿点染色体单体形成一断片，此两者均可记录下来。
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| 4. | Sister - chromatid exchange assay
姐妹染色单体互换试验
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| 5. | Asymmetrical chromatid exchange
非对称型染色单体交换
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| 6. | Non - sister chromatid
非姐妹染色单体
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| 7. | Breakage of chromatid
染色单体断裂
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| 8. | Experimental investigation of pulsed current electromagnetic fields on chromatid exchange of lymphocytes
脉冲电流电磁场对淋巴细胞染色单体互换的影响
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| 9. | 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。
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| 10. | Crossing over the exchange of material between homologous chromatids by the formation of chiasmata
交换：同源染色单体之间形成交叉时遗传物质的交换现象。
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