基本释义:

n.四元组; 四分染色体; <化>四价元素; （数目）4

实用例句

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.

《简明英汉词典》

Microspore abortion occurred after the tetrad formation.

小孢子败育发生在四分体形成以后.

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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.

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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.

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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.

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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.

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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.

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英英释义

1. the cardinal number that is the sum of three and one