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
英英释义
noun
- the cardinal number that is the sum of three and one
双语例句
- Otherwise, the chromosome morphology involving Haynaldia chromatin was observed at preleptotene I, and the frequencies of chromatin nucleus at tetrad stage and at microspore stage were investigated.
此外,观察了前期I的簇毛麦染色体形态,统计了四分体和小孢子中小麦和簇毛麦染色质微核频率。 - 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。 - 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 Huangshan A-type granites with tetrad REE: constraints on Mesozoic lithospheric thinning of the southeastern Yangtze craton?
高度演化的黄山A型花岗岩:对扬子克拉通东南部中生代岩石圈减薄的约束? - 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。 - 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。 - The megaspore mother cell undergoing meiotic divisions produces a T-shaped, or, rarely, linear tetrad.
大孢子母细胞减数分裂产生T形四分体和少数线形四分体。 - Microspore mother cells meiosis was conformed to simultaneous type with mostly tetrahedral and decussate tetrad.
小孢子母细胞减数分裂属于同时型,小孢子在四分体中的排列方式多数为四面体形,少数为十字交叉形。 - 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。 - It appears however that the formation of megaspore tetrad associated with the high GA3/ ZT ratio.
高水平的ZT/IAA有利于大孢子母细胞和花粉粒的形成,而大孢子四分体的形成则需要高的GA3/ZT比值。