At the sites where exchange happens, chiasmata formed.

在发生交换的地方，形成了交叉。

The chiasmata remain on the chromosomes until they are at the transition to anaphase 1.

交叉保留在染色体上，直到它们过渡到后期 1。

At this stage, non-sister chromatids may cross-over at points called chiasmata (plural) , (singular: chiasma) .

在这个阶段，非姐妹染色单体可能会交叉。

However, the homologous chromosomes of each bivalent remain tightly bound at chiasmata, the regions where crossing-over occurred.

然而，每个二价体的同源染色体仍然紧密结合在交叉部位，也就是发生交叉的区域。