tetrad 是什么意思
n. 四个；四个一组；[生物] 四分染色体；四价元素
英语词源
tetrad (n.)"the number four, collection of four things," 1650s, from Greek tetras (comb. form tetrad-) "group of four, number four" (see tetra-).
tetrad 权威例句
- 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.
来自互联网
tetrad 造句
- 1. There were micronuclei and tetraspores of various types in the tetrad stage .
- 四分体阶段有微核和不同类型的四分孢子群。
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- 2. In this paper the fine structure of the distribution model of REE in Karst deposits-the tetrad effect and its meaning are discussed.
- 本文阐述喀斯特沉积物中稀土分布模式的精细结构—稀土四重效应特征及其研究意义。
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- 3. Based on the PAPD and tetrad analysis, It is easy to explore the molecular marker linked to thermotolerance-related genes and to clone the related genes for further experimentation.
- 从而为今后通过四分子分析寻找与耐热相关基因紧密连锁的分子标记，并进一步克隆和定位有关的基因打下基础。
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- 4. The megaspore mother cell meiosis to form a linear megaspore tetrad.
- 大孢子母细胞减数分裂产生直线形大孢子四分体。
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- 5. The tetrad analysis of some hybrids led the discovery of two complementary genes systems.
- 通过四分体分析发现一些杂种有两种互补基因系。
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- 6. Depositions of wall started at the late stage of tetrad, and the exine was fundamentally completed by late stage of microspore.
- 小孢子外壁的沉积始于四分体晚期，至小孢子晚期外壁已基本发育完全。
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- 7. The tapetum begins to vary at the stage of tetrad with the cytoplasm moving into the 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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- 8. In diplotene the pairs of chromatids begin to separate from the tetrad formed by the association of homologous chromosomes.
- 双线期时，配对的染色单体开始从四分体中分离，此时常可见染色体交叉。
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- 9. 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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- 10. 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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- 11. The micronuclei were not observed in tetrad stage.
- 四分体阶段无微核出现。
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- 12. This phenomenon occurs in the early tetrad stage.
- 这个现象在早期四分体阶段出现。
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- 13. Micronuclei were observed in the tetrad stage.
- 四分体阶段有微核。
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- 14. At tetrad stage, dyad, triad, tetrad with micronucleus and polyad appeared.
- 四分体时期还出现二分体、三分体、含微核的异常四分体及多分体。
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- 15. The megaspore tetrad is linear, but only the megaspore near thechalazal end remain The formation of embryo sac is Polygonum type.
- 功能大孢子为合点端的一个单孢子，胚囊发育类型为蓼型；
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- 16. 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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- 17. So it defined as crassinucellate. The megaspore mother cell divides transversally to form a linear megaspore tetrad. The megaspore at the chalazal end develops into the embryo sac mother cell.
- 大孢子母细胞经横向分裂后产生一直线形的大孢子四分体，之后位居合点端之大孢子发育成胚囊母细胞。
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- 18. The megaspore mother cell undergoing meiotic divisions produces a T-shaped, or, rarely, linear tetrad.
- 大孢子母细胞减数分裂产生T形四分体和少数线形四分体。
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- 19. Otherwise, the chromosome morphology involving Haynaldia chromatin was observed at preleptotene I, and the frequencies of chromatin nucleus at tetrad stage and at microspore stage were investigated.
- 此外，观察了前期I的簇毛麦染色体形态，统计了四分体和小孢子中小麦和簇毛麦染色质微核频率。
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- 20. Microtubule bundles in the tetrad cell radiated from the nucleus.
- 在细胞质存在一个疏松的微管束网络。
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- 21. Stability of the complexes shows the "Tetrad effect".
- 配合物稳定性呈“四分组效应”。
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- 22. With the help of micronucleus technology of Tradescantia paludosa tetrad, the mutagenicity survey was conducted on the lower stream of Mulan and the shallow well water along its banks.
- 采用紫露草四分体微核技术，对莆田木兰溪下游河溪水和饮用的浅井水进行致突变性监测。
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- 23. The present paper is dealing with a simple method to correct the distance of linked genes in tetrad analysis in Neserospora crassa.
- 本文探讨一个在链孢霉四分体分析中连锁基因距离矫正的简便方法。
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- 24. The chromosome fragments which are induced by the agent at the early meiotic stage become micronuclei at the tetrad stage.
- 如此，那些在早期减数分裂过程中所引起的染色体断裂部分，将在四分体时期变成微核。
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- 25. The microspores are arranged in a tetrahedral tetrad. The mature pollen grains are of the 2-celled and 3-celled types.
- 小孢子四分体为四面体型排列，成熟花粉有2-细胞和3-细胞型2种。
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- 26. The sporocytes form tetraspores by meiosis and enter the tetrad phase.
- 孢子母细胞减数分裂形成四分孢子，进入四分体时期。
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- 27. The abnormality of tetrad callose wall degradation and tapetum development was associated with the abortion of microspore.
- 导致小孢子败育的原因与四分体胼胝质壁不适时解体和绒毡层细胞发育异常、延迟解体有关。
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- 28. In tetrad stage, the structures of tapetal cells begin to dissociate.
- 四分体时期， 绒毡层细胞内部结构开始解体。
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- 29. Embryological observation of ovary culture shows that haploid plants are from megaspore tetrad, while diploid plants are probably from nucellus cell.
- 同时在珠心细胞中观察到旺盛的分裂活动和细胞团的形成，这可能是二倍体植株的来源。
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- 30. Embryological observation of ovary culture shows that haploid plants are from megaspore tetrad, while diploid plants are probably from nucellus cell.
- 同时在珠心细胞中观察到旺盛的分裂活动和细胞团的形成，这可能是二倍体植株的来源。
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- 31. syzygetic tetrad
- 合冲的拼四小组
-- 来源 -- 英汉 - 翻译参考[网络]
- 32. equianharmonic tetrad
- 等交比拼四小组
-- 来源 -- 英汉 - 翻译参考[网络]
- 33. double crossing over tetrad
- 双交换四分体
-- 来源 -- 英汉 - 翻译参考[网络]
- 34. chromatid tetrad
- 四分染色单体
-- 来源 -- 英汉 - 翻译参考[网络]
- 35. tetrad analysis
- 四分子分析
-- 来源 -- 英汉 - 翻译参考[网络]
- 36. tetrahedral tetrad
- 四面体形四合花粉
-- 来源 -- 英汉 - 翻译参考[网络]
- 37. tetrad division
- 四分体分裂
-- 来源 -- 英汉 - 翻译参考[网络]
- 38. rhomboidal tetrad
- 菱形四合花粉
-- 来源 -- 英汉 - 翻译参考[网络]
- 39. tetragonal tetrad
- 四边形四分体|四边形四合花粉
-- 来源 -- 英汉 - 翻译参考[网络]
- 40. inversion tetrad
- 四重反演轴
-- 来源 -- 英汉 - 翻译参考[网络]
