tetrad

• n. 四个；四个一组；[生物] 四分染色体；四价元素

英文词源

tetrad (n.)

"the number four, collection of four things," 1650s, from Greek tetras (comb. form tetrad-) "group of four, number four" (see tetra-).

双语例句

1. 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.

来自《简明英汉词典》

2. 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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3. 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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4. 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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5. 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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