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tetrads 英'tetrædz美'tetrædz COCA³¹⁵¹¹¹⁺⁴BNC¹¹⁴⁰²⁴⁺⁵
基本英英Thesaurus例句
四色相等间隔配色原型tetrad的复数
名词 tetrad:
the cardinal number that is the sum of three and oneas in.four
同义词 quadrivium,quadrumvirate,quadruple,quadruplet,quadruplets,quartet,quartette,quaternary,quaternion,quaternity,tetrad,tetralogyquadrigeminal,quadripartition Cytokinesis of microsporocyte meiotic division is of simultaneous type and the tetrads are tetrahedral.
小孢子母细胞减数分裂过程中的胞质分裂为连续型，形成的四分孢子为四面体型； cnki
Most microspore tetrads were arranged to be tetrahedral and the mature pollen granules were 2- cell type.
北五味子小孢子母细胞在减数分裂后的胞质分裂为同时型； cnak
The cytokinesis in the microsporocyte meiosis was of the successive type, and microspore tetrads were arranged bilaterally.
小孢子母细胞减数分裂时胞质分裂方式为连续型，小孢子四分体左右对称排列。 fabiao
At the same time, tapetum of the fertile anthers began to disappear and that of sterile anthers were swelling and expanded and crowded the tetrads. There was no pollen grain in the mature anthers.
而不育花药却不能释放小孢子，而是被膨大的绒毡层挤聚在一起，最后解体，成熟花药中也没有花粉粒的产生。 www.cnak.net.cn
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。 fabiao
The microspore mother cell underwent meiosis before it turned into microspore tetrad. Its cytokinesis was simultaneous type, tetrads were mostly tetrahedral, less frequently isobilateral.
小孢子母细胞减数分裂过程中的胞质分裂为同时型，小孢子四分体多为正四面体型，少数为左右对称型。 cnki
The microspore mother cells give rise to isobilateral tetrads by meiosis. Cytokinesis is successive. The mature pollen grains are2- celled and are shed singly.
小孢子母细胞经减数分裂形成左右对称型四分体，胞质分裂为连续型，成熟花粉粒为2-细胞型； chinbullbotany
The other20% of pollen mother cells showed abnormal meiosis. Tetrads were not formed because there were1—2 lagging chromosomes. The bigger tetranuclear pollen grains were observed;
另外的20%的花粉母细胞，由于1—2个落后染色体的存在，减数分裂不能正常进行，变为一种大型的四核花粉粒； cnki
The results showed that the microspore abortion occurred at the stage of microspore mother cell, tetrads and uninucleate microspore.
结果表明，小孢子的败育发生在小孢子母细胞时期、四分体时期以及单核小孢子时期。 cnki |