chiasmata

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

)移端：发生在第数分裂后期，染色体向二价体染色体臂的末端移动的过。

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

有时可以从二价体末端处滑开，因此移端过可以降低率。