减数分裂

Few studies have been conducted so far on meiotic progression and none was carried out on its control via hypoxanthine in goat oocytes.

但是，有关山羊卵母细胞的减数分裂进程及其调控均有待进一步的研究。

Here we show that the inner nuclear membrane protein SUN1 specifically associates with telomeres between the leptotene and thediplotene stages during meiotic prophase I.

我们发现内核膜蛋白SUN1从减数分裂前期Ⅰ的细线期到终变期，特异性的与染色体端粒相结合。

At the leptotene stage the enzyme was mainly present in the cisternae of smooth endoplasmic reticulum and their derived vesicles, but absent in the Golgi body and Golgi vesicles.

花粉母细胞减数分裂前期Ⅰ的活性进行了电镜细胞化学定位，以研究其在次生胞间连丝和胞质通道形成中的作用。

According to the ultrastrucral observation of PMCs, three successively specific phases could be distinguished as leptotene, zygotene and pachytene in early prophase Ⅰ of Arabidopsis.

通过对拟南芥菜减数分裂前期花粉母细胞的形态学观察，我们认为在早前期Ⅰ中，拟南芥菜又可以分为三个时期：细线期、偶线期和早粗线期。

At this time, meiosis has not yet occurred in the megasporangium.

在这次，减数分裂在大孢子囊中还没有发生。

Each megaspore mother cell, which ultimately undergoes meiosis, giving rise to a linear series of four megaspores.

每 megaspore 母亲细胞，最后接受减数分裂，引起线连续的四 megaspores。

Now the research has made progress.(1) The meiosis stages of megaspore could be discriminated timely through observing the meiosis of microspore under the same environmental conditions, according to the association of female and male buds during development.

1首次提出利用雌、雄花芽发育进程的时序性相关性，以相同生境以及培养条件下的小孢子发育进程为参照，从而相对准确地实现白杨大孢子母细胞减数分裂进程即时判别的技术方法。

Ovule development began in August, and rectangle megasporocyte began to occur in December, and linear tetrads of megaspores were formed in meiosis. In most occasions, only the chalazal megaspore was functional.

云南红豆杉胚珠从8月开始发生，大孢子母细胞12月开始发生，呈方形，减数分裂后形成4个"一"字形大孢子，在大多数情况下，只有靠合点端的大孢子发育为功能大孢子。

Under the same environmental conditions when the meiosis of microspore mother cell develop into tetrads the female buds were dipped duly with colchicine solution, which guaranteed that chromosome doubling of megaspore in white poplar could be accomplished in a short time. So much workload was cut down, and induction efficiency of triploid white poplars was also improved.

当相同生境以及培养条件下的小孢子母细胞减数分裂达到四分体后，适时采用秋水碱溶液对雌花芽进行浸泡处理，可保证白杨大孢子染色体加倍处理能集中于一个较短的时间段内进行，从而大大减轻了工作量，同时提高三倍体诱导效率和效果。

The first stage of meiosis, constituted by a series of events that include ''.

前期阶减数分裂的第一个阶段，由一系列的事件组成，包括脱氧核糖核酸的''。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。