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tetrad

英 ['tetr?d]
  • n. 四個；四個一組；[生物] 四分染色體；四價(jià)元素
IELTS

英文詞源

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

雙語例句

1. At this point esch chromosome consist of a pair of chromatids and the two associated chromosomes are termed a tetrad.
此時(shí)每條染色體由一對染色單體構(gòu)成,這兩條聯(lián)合的染色體稱為四分體.

來自《簡明英漢詞典》

2. Microspore abortion occurred after the tetrad formation.
小孢子敗育發(fā)生在四分體形成以后.

來自互聯(lián)網(wǎng)

3. Megaspore tetrad is linear. The chalazal megaspore develops into an embryo sac of Polygonum type.
大孢子四分體為線形, 合點(diǎn)端功能大孢子發(fā)育成為蓼型胚囊.

來自互聯(lián)網(wǎng)

4. Cytokinesis was simultaneous and the arrangement of microspores in the tetrad was tetrahedral.
胞質(zhì)分裂為同時(shí)型,四分體中小孢子排列呈正四面體形.

來自互聯(lián)網(wǎng)

5. The characteristics of tetrad was that the nucleus and Golgi bodies being in the active state.
四分孢子的顯著特征是細(xì)胞核和高爾基體呈活躍狀態(tài).

來自互聯(lián)網(wǎng)