tetrad

英

美

网络  四分体; 四联球菌; 四联体; 四分子; 四分孢子

复数：tetrads　

计算机

英英释义

noun

• the cardinal number that is the sum of three and one
  Synonym:four4IVquaternquaternionquaternaryquaternityquartetquadrupletfoursomeLittle Joe

双语例句

• Tapetum cell hyperplasia from the tetrad to the single nucleus early period.
  绒毡层细胞在四分体&单核早期发生增生；
• In the course of the embryonic development, after the microspore tetrad is formed, although some forms of the microspore were under developed, and lose of protoplasm, but some have formed normal microspore.
  在胚胎发育过程中，小孢子四分体形成后，虽然出现有些小孢子形状不规则，原生质少或无等现象，但也有发育正常的花粉粒。
• This phenomenon occurs in the early tetrad stage.
  这个现象在早期四分体阶段出现。
• Pollen abortion of MS-4 was in the single nucleus pollen grain stage after the division of microspore tetrad.
  MS-4花粉败育的时期，是在小孢子四分体分开至单核花粉粒时期。
• Callose exists mainly in transverse walls during dyad, triad and tetrad stages, a little in side walls.
  二分体、三分体、四分体时期，胼胝质荧光主要存在于大孢子之间的横壁上，侧壁内胼胝质荧光较弱。
• Chromosomes out of nuclei can be seen both at prophase ⅱ and tetrad period.
  前期Ⅱ和四分体时期可观察到核外染色体；
• The process of pollen abortion begins with vacuole formation and gradual enlargement in the tetrad.
  花粉败育的过程从四分体开始，细胞质内液泡逐渐增大，接着细胞器解体，细胞核解体。
• The pairing and segregating of homologous chromosomes at the frist and second division of meiosis were conformed with PMC meiosis, and finally, the tetrad were formation.
  在减数第一和第二次分裂中，同源染色体的配对和分离基本正常，最后形成四分体。
• Study on Simultaneous Determination of Pigments in Tetrad Mixtures by Spectrophotometry with Wavelet Transform-Principal Component Regression Method
  小波变换-主成分回归法在四组分食用色素同时测定中的应用研究
• The sporogenous cell functioned directly as megaspore mother cell. The tetrad of megaspores was linear in arrangement, and every megaspore might be functional.
  孢原细胞平周分裂形成一个周缘细胞和一个造孢细胞，造孢细胞直接发育成大孢子母细胞，四分体大孢子呈线形排列，它们均可成为功能大孢子；