查询词典 meiosis

Perenial flowering planrs of Strelitzia reginae are used as material. The First meiosis young flowers are induced with different concentration colchicines (0.05%, 0.10%, 0.20%).

以多年生开花鹤望兰植株为试验材料，采用不同浓度秋水仙素(0.05%， 0.10%， 0.20%)对鹤望兰处于减数分裂Ⅰ期的幼小花蕾进行诱导。

But, there was no Ca(superscript 2+) precipitate in tapetal cells of Zhenshan 97B at the pollen mother cell stage and the meiosis stage and the Ca(superscript 2+) precipitates in tapetal cells mainly deposited in the disaggregated cytoplasm.

而保持系绒毡层细胞遮花粉母细胞时期和减数分裂时期细胞内没有Ca(上标 2+)沉淀；单核花粉时期绒毡层细胞内的Ca(上标 2+)沉淀主要分布在解体的细胞质内。

The cytoplasm of the tapetum cells of Zhenshan 97A deposited a few Ca(superscript 2+) precipitates at the pollen mother cell stage. At the meiosis stage, there were many large Ca(superscript 2+) precipitates at the inner longitudinal cell wall; there were a layer Ca(superscript 2+) precipitates around the tapetal cells.

珍汕97A绒毡层细胞从花粉母细胞时期开始，细胞质内有少量颗粒状的Ca(上标 2+)沉淀；减数分裂时期，绒毡层细胞的内切向壁表面有大量大颗粒的Ca(上标 2+)沉淀；单核花粉时期绒毡层细胞周围集聚一层Ca(上标 2+)沉淀。

No tapetal cells were formed or tapetam collapsed at very early stage in some anther chamber during the microsporogenesis; Pollen mother cells in another chamber were not developed and microspore vacuolized; Tapetum cells developed abnormally, giantized and crammed the anther chamber; Some tapetum cells developed normally, but PMCs developed abnomally, which deformed at sporogeneous stage, and then were abhensive each other and finally degenerated. Nearly no PMCs could complete the process of meiosis, and form the tetrad, leading to the failure of normal microspore development.

药室的绒毡层细胞不形成或提前解体；药室内的花粉母细胞不发育或小孢子液泡化；绒毡层细胞发育异常，出现巨型化而挤满整个药室；绒毡层细胞虽发育正常，但花粉母细胞发育异常，在造孢细胞时期即开始出现变形现象，随后发生粘连退化；绝大部分花粉母细胞不能完成正常的减数分裂过程形成四分体，导致小孢子退化。

Terminalization The movement of chiasmata to the end of the bivalent arms, a process that may occur during late prophase I of meiosis.

交叉移端：发生在第一次减数分裂后期，染色体交叉向二价体染色体臂的末端移动的过程。

Molecular studies have identified some genes participating in this process, including those regulating anther cell division and differentiation, controlling male meiosis, supporting pollen development, and promoting anther dehiscence.

分子生物学的研究已经发现了一些参与这一过程的基因，包括控制花粉囊组织的分化、小孢子母细胞的减数分裂、小孢子的发育和花药的开裂等。

The point of contact between paired chromatids during meiosis, resulting in a cross-shaped configuration and representing the cytological manifestation of crossing over.

染色体交叉在减数分裂过程中成对的染色体之间的接触点产生一种交叉形状的构造，代表着基因互相交换的细胞表现形式

This heterosynapsis at early stage of meiosis in rearranged autosomes, results in unbalanced germs and pregnancy wastages.

重排染色体直接的异源配对导致不平衡配子的产生而出现受孕浪费。5。

Under normal temperature (25-30℃), the process of pollen mother cell meiosis is normal; The most of chromosomes become bivalents which like "V","O","Y","X", sticks and dots, and mainly like dots,"V" and "O"; and a few of univalent (0.79% of Tainong 1 and 0 of Irwin) and multivalent (4.76% of Tainong 1 and 3.57% of Irwin) had been observed.

常温（25~30℃）条件下，花粉母细胞减数分裂过程较为正常，双线期染色体主要形成二价体，二价体构型以&V&型、&O&型、&Y&型、&X&型、点状和棒状等形式存在，并以点状、&V&型和&O&型较多见，出现少量的单价体和多价体，其中台农1号为0.79%和4.76%，Irwin为0和3.57%；同时仅在少量中期Ⅱ和后期Ⅱ花粉母细胞中观察到落后染色体。

In meiosis of pollen mother cells of the tetraploids and the hexaploids, only bivalents were observed in most of the populations, although in several populations or individuals a few univalents or tetravalents appeared. In the hexaploids, hexavalents were not observed.

四倍体和六倍体的花粉母细胞减数分裂染色体构型在大多数居群都为二价体(四倍体中30个二价体，六倍体中45个二价体)，少数居群或是个体除二价体为主外还出现单价体和四价体，六倍体类型没有出现六价体构型。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷