chiasmata

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

有时叉可以从二价体末端处滑开，因此移端过程可以降低叉。

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

叉)移端：发生在一次减数分裂，色体叉向二价体色体臂的末端移动的过程。