The spindle fibers shorten and the centromere divides, so each chromosome becomes two separate chromatids.

纺锤丝缩短，着丝粒分裂，所以每个体变成个独立单体。

The DNA is exactly replicated, and each chromosome now becomes two identical chromatids joined by the centromere.

DNA 被精确复制，每体现在变成由着丝粒连接相同单体。

In metaphase 2, the centromeres contain two kinetochores that attach to spindle fibers from the centrosomes at opposite poles.

中期 2，着丝粒与纺锤丝连结。

The microtubules invade the nuclear region after the nuclear envelope disintegrates, attaching to the chromosomes at the kinetochore.

核膜解体后，微管侵入核区，附着在着丝粒体上。

This is followed by anaphase 2, in which the remaining centromeric cohesion is cleaved, allowing the sister chromatids to segregate.

紧随其后是后期 2，在这一阶段，着丝粒纵裂，姐妹单体分离。

If two chromosomes were glued together, you'd expect to find two centers, or centromeres.

如果体粘合在一起，你会期望找到个中心，或着丝粒。