chiasmata

The chiasmata can slip off the ends of the bivalents, and thus chiasma frequency may be reduced by terminalization.

有时交叉可以从二端处滑开，因此移端程可以降低交叉频率。

Terminalization The movement of chiasmata to the end of the bivalent arms, a process that may occur during late prophase I of meiosis.

交叉)移端：发生在一次减数分裂后期，染色交叉向二染色臂端移程。