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

有时以从二价体末端处滑开，端过程以降低率。

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

)端：发生在第一次减数分裂后期，染色体向二价体染色体臂的末端动的过程。