Tetrahedral tetrads.
四合体花粉
The tetrads eventually shrivel or are resorbed.
这种四分体最终萎缩或被再吸收。
Tetrads are usually arranged in tetrahedron and a few of them are bilateral symmetry.
四分体排列通常为四面体型，少数左右对称型。
Cytokinesis is of the simultaneous type and microspore tetrads are mainly tetrahedral.
小孢子母细胞减数分裂为同时型。
Successive cytokinesis in the megasporocyte follows meiosis and the megaspore tetrads are linear.
大孢子母细胞减数分裂形成直线型四分体。
The microspore mother cells undergo meiosis, the tetrahedral tetrads of microspores are formed by simultaneous cytokinesis.
花粉母细胞减数分裂后细胞质同时型分裂。
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