The sister chromatids by convention are now called sister chromosomes as they move toward opposing poles.
按照惯例，姐妹染色单体现在被称为姐妹染色体，因为它们朝向相反的两极移动。
Sister chromosome
原声例句
日常生活医学科普
TED-Ed（视频版）
Recombination occurs uniquely in each sex cell— making two sisters' chromosomes different not only from their parents', but from each other's.
在每个性细胞中发生的重组都是独一无二的——使两姐妹的染色体不仅不同于她们父母的，而且也不同于彼此的。
中文百科
染色单体 Chromatid
（重定向自Sister chromosome）
染色单体（英语：Chromatid）又称染色分体，是染色体的一部分。两个染色单体叫作染色体。
在减数分裂或有丝分裂过程中，复制了的染色体中的两条子染色体。每个染色单体是由一条脱氧核糖核酸（DNA）双链经过紧密盘旋折叠而成。中期染色体由两条染色单体组成，两者在着丝粒（centromere）部位相互结合。
英语百科
Chromatid 染色单体
（重定向自Sister chromosome）
A chromatid (Greek khrōmat- 'color' + -id) is one copy of a newly copied chromosome which is still joined to the other copy by a single centromere.
Before replication, one chromosome is composed of one DNA molecule. Following replication, each chromosome is composed of two DNA molecules; in other words, DNA replication itself increases the amount of DNA but does not increase the number of chromosomes. The two identical copies—each forming one half of the replicated chromosome—are called chromatids. During the later stages of cell division these chromatids separate longitudinally to become individual chromosomes.
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