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

• 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；
• The merit of viewing the four as a tetrad rather than selecting only three to form a triangle is that it gives greater prominence to quality.
  把这四个变量看成是四元的而不是选出三个组合成三角形，它的优点在于：它给质量上带来了很多显著的帮助。
• The characteristics of tetrad was that the nucleus and Golgi bodies being in the active state.
  四分孢子的显著特征是细胞核和高尔基体呈活跃状态。
• 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。
• Microspore abortion occured after the tetrad formation.
  小孢子败育发生在四分体形成以后。
• At this point esch chromosome consist of a pair of chromatids and the two associated chromosomes are termed a tetrad.
  此时每条染色体由一对染色单体构成，这两条联合的染色体称为四分体。
• 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；
• There is only one layer of parietal cells at the stage of sporogenous cell, megaspore mother cell and tetrad.
  造孢细胞，大孢子母细胞和四分体时期，周缘细胞仅1层。
• The results are as follows: During anther early development, only few ATPase precipitates located in small vacuoles and the nucleus of microspore mother cell and tetrad microspore.
  结论如下：在花药发育过程中，小孢子母细胞和四分体内的ATPase很少，仅在细胞核及小液泡中分布有少量的ATPase。
• The tetrad analysis of some hybrids led the discovery of two complementary genes systems.
  通过四分体分析发现一些杂种有两种互补基因系。