At this point each chromosome consist of a pair of chromatids and the two associated chromosomes are termed a tetrad.
此時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.
《簡明英漢詞典》
Microspore abortion occurred after the tetrad formation.
小孢子敗育發(fā)生在四分體形成以后.
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Megaspore tetrad is linear. The chalazal megaspore develops into an embryo sac of Polygonum type.
大孢子四分體為線形, 合點(diǎn)端功能大孢子發(fā)育成為蓼型胚囊.
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Cytokinesis was simultaneous and the arrangement of microspores in the tetrad was tetrahedral.
胞質(zhì)分裂為同時型,四分體中小孢子排列呈正四面體形.
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The characteristics of tetrad was that the nucleus and Golgi bodies being in the active state.
四分孢子的顯著特征是細(xì)胞核和高爾基體呈活躍狀態(tài).
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The tapetum begins to vary at the stage of tetrad with the cytoplasm anther cell.
小孢子孢原為多細(xì)胞,小孢子母細(xì)胞減數(shù)分裂產(chǎn)生四面體型的小孢子四分體.
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The chalazal megaspore of a linear tetrad develops into a polygonum type sac.
四分體線行排列,合點(diǎn)端的大孢子發(fā)育為蓼型胚囊.
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