tetrahedral tetrad

Microspore mother cells meiosis was conformed to simultaneous type with mostly tetrahedral and decussate tetrad.

小孢子母细胞减数分裂属于同时型，小孢子在四分体中的排列方式多数为四面体形，少数为十字交叉形。

During the mitosis of microspore mother cells, the nucleus of tapetum divides into two. The primary sporogenous cells develop into microsporocyte by mitosis. The microsporocyte undergoes simultaneous meiotic division and produces tetrahedral tetrad.

初生造孢细胞经过有丝分裂，形成次生造孢细胞，然后次生造孢细胞发育成小孢子母细胞，小孢子母细胞经过减数分裂形成四分体，胞质分裂为同时型。

Cytokinesis was simultaneous and the arrangement of microspores in the tetrad was tetrahedral.

胞质分裂为同时型,四分体中小孢子排列呈正四面体形.