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

缩短了，着粒分裂，所以每个染色体变成两个独立的染色单体。

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

DNA 被精确复制了，每条染色体现在变成了两条由着粒连接的相同染色单体。

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

中期 2，着粒与连结。

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，附着在着粒的染色体上。

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

紧随其后的是后期 2，在这一阶段，着粒纵裂，姐妹染色单体分离。

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

如果两条染色体粘合在一起，你会期望找到两个中心，或着粒。