1.【生】四合子,四分体
2.四个;四个一组的东西
3.【化】四价元素
4.【几】拼四小组
1.【生】四合子,四分体
2.四个;四个一组的东西
3.【化】四价元素
4.【几】拼四小组
1.a group or series of four things or people
2.a group of four chromosomes in a diploid cell that is about to undergo the cell pision that produces sex cells
3.a group of four cells produced by the pision of a single parent cell, e.g. as it occurs in the formation of pollen and spores
4.an atom or chemical group with a valence of four
1.a group or series of four things or people
2.a group of four chromosomes in a diploid cell that is about to undergo the cell pision that produces sex cells
3.a group of four cells produced by the pision of a single parent cell, e.g. as it occurs in the formation of pollen and spores
4.an atom or chemical group with a valence of four
1.The results showed that the meiosis behavior of pollen mother cell of sterile is normal. Abortion occurred after formation of tetrads.
结果表明，不育株花粉母细胞减数分裂染色体行为未见异常，败育发生在四分小孢子形成之后。
2.The cytokinesis of the microspore mother cells in meiosis is successive and the microspore tetrads are tetrahedral.
小孢子母细胞减数分裂中的胞质分裂为连续型，四分孢子为四面体型；
3.The microspore mother cells in meiosis is successive and the microspore tetrads are tetrahedral and bilateral symmetry.
小孢子减数分裂为连续型。四分体呈四面体型和左右对成型。
4.pollen tetrads in masses, solitary in each anther cell, pollen carriers spatulate, erect.
在群众内四合花粉，单生在内每花药室，花粉搬运工，直立。
5.Stamens 10, sometimes with spurs or awns, dehiscing by pores, pollen in tetrads, rarely single.
雄蕊10，有时有距或者芒，孔裂，花粉为四分体，很少单体。
6.pollen yellow, shed in tetrads.
花粉黄，成四分体式脱落。