At this point each chromosome consist of a pair of chromatids and the two associated chromosomes are termed a tetrad.

此时每条染色体由一对染色单体构成,这两条联合的染色体称为四分体.

《简明英汉词典》

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

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.

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

在分裂后期,纤维开始变短, 染色单体分离.

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