tetrads

Cytokinesis at meiosis of microspore mother cells is modified simultaneous, and tetrads are decussate or isobilateral, occasionally linear.

四体排列方式为交叉型或左右对称型,偶为直线型；

Pollen mother cells undergo meioses through simultaneous cytokinesis and give rise to tetrads of microspores, which are tetrahedrally arranged.

花粉行减数，属同时型，产生小孢子四体，为四面体形。