tetrads

tetrads

美 ['tetrædz] 　英 ['tetrædz]

• n.【生】四合子；四個；四個一組的東西；【化】四價元素
• 網絡四分體；四聯球菌；四體花粉

詞形變化

復數：tetrads  

英漢解釋

n.	1. 【生】四合子,四分體 2. 四個;四個一組的東西 3. 【化】四價元素 4. 【幾】拼四小組

英英解釋

n.

1. a group or series of four things or people 2. a group of four chromosomes in a diploid cell that is about to undergo the cell division that produces sex cells 3. a group of four cells produced by the division of a single parent cell, e.g. as it occurs in the formation of pollen and spores 4. an atom or chemical group with a valence of four

例句

The results showed that the meiosis behavior of pollen mother cell of sterile is normal. Abortion occurred after formation of tetrads.

結果表明，不育株花粉母細胞減數分裂染色體行為未見異常，敗育發生在四分小孢子形成之后。

The cytokinesis of the microspore mother cells in meiosis is successive and the microspore tetrads are tetrahedral.

小孢子母細胞減數分裂中的胞質分裂為連續型，四分孢子為四面體型；

The microspore mother cells in meiosis is successive and the microspore tetrads are tetrahedral and bilateral symmetry.

小孢子減數分裂為連續型。四分體呈四面體型和左右對成型。

pollen tetrads in masses, solitary in each anther cell, pollen carriers spatulate, erect.

在群眾內四合花粉，單生在內每花藥室，花粉搬運工，直立。

Stamens 10, sometimes with spurs or awns, dehiscing by pores, pollen in tetrads, rarely single.

雄蕊10，有時有距或者芒，孔裂，花粉為四分體，很少單體。

pollen yellow, shed in tetrads.

花粉黃，成四分體式脫落。