tetrad
英['tetræd] 美['tetræd]
At this point each 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.
Microspore abortion occurred after the tetrad formation.
小孢子败育发生在四分体形成以后.
Megaspore tetrad is linear. The chalazal megaspore develops into an embryo sac of Polygonum type.
大孢子四分体为线形, 合点端功能大孢子发育成为蓼型胚囊.
Cytokinesis was simultaneous and the arrangement of microspores in the tetrad was tetrahedral.
胞质分裂为同时型,四分体中小孢子排列呈正四面体形.
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.
The tapetum begins to vary at the stage of tetrad with the cytoplasm anther cell.
小孢子孢原为多细胞,小孢子母细胞减数分裂产生四面体型的小孢子四分体.
The chalazal megaspore of a linear tetrad develops into a polygonum type sac.
四分体线行排列,合点端的大孢子发育为蓼型胚囊.
A tetrad of distinct elementssearth, air, fire and water.
出自：A. Stevens