核分裂

The potassium dichromate at different concentrations could increase the cell mitosis index.

以不同浓度的重铬酸钾为诱变剂，测定玉米根尖细胞的微核率、有丝分裂指数和染色体畸变率。

More prophase and prometaphase cells may be obtained by this technique.

在培养基中加入5-溴脱氧尿嘧啶核苷使细胞同步化6—8小时，可以得到较多的前期和前中期分裂细胞。

The immatured and dividing erythrocyte were found. The small lymphocytes with pseudopod and large lymphocytes with the villus were observed also. In addition, the monocyte, neutrophil and thrombu cells were recognized by different shapes of nucleolus.

实验还观察到处于分裂状态的红细胞、细胞表面有伪足样胞突的小淋巴细胞和细胞表面有许多微绒毛突起的大淋巴细胞、核呈多种形态的单核细胞和中性粒细胞及不同形态的血栓细胞等。

The splitting of the cytoplasm is also restrained therefore they form many multi-core cells. With the reducing of the microfilament the pseudopodium of the cell surface become fewer, shorter and wider.

结果发现，在CB作用下，癌细胞生长受到抑制，细胞计数减少；胞质分裂受到抑制，形成多核细胞；微丝结构减少，细胞表面的伪足变少变短变粗。

Clinical featu res: 18-year-old female, 155 cm high, 45 kg weight, uterus: 22×18 ×17 mm, unclear bilateral ovaries, normal pudendum, breast

A： 中期G带图； B：异常染色体核型分析图； C：家系图； D：减数分裂四分体配对模式图。临床表现：女， 18岁，身高155 cm，体重45 kg，子宫大小22

Membrane reconstruction, nucleolar re-formation, at the same time cytokinesis.

核膜重建，核仁重新形成，同时进行细胞质分裂。

F1 hybrid has the morphological feature which is between the male and female parents and shoed strong heterosis, exuberant vitality, late ripe period and low rate of self-fertility. The average chromosome configuration of F1 in PMC MI was 18.58Ⅰ+18.59Ⅱ+0.085Ⅲ+0.028Ⅳ. At anphase Ⅰ in PMC, some laggard chromosomes arranged in equatorial plate. Micronucleus and a lot of abnormal cells can be observed at dyad, tetrad and microspore.

杂种F1形态特征介于双亲之间，具有较强的杂种优势，生长旺盛，熟期晚，自交结实率较低。F1花粉母细胞减数分裂中期Ⅰ平均染色体构型为18.58Ⅰ+18.59Ⅱ+0.085Ⅲ+0.028Ⅳ，PMC后期Ⅰ观察到部分落后染色体排列在赤道板上；二分体、四分体和小孢子时期，细胞内普遍观察到微核，且出现大量异形细胞。

Previous studies have demonstrated that primary spermatocyte can undergo meiotic divisions in MI oocytes and the resulting embryos can develop to term. However, the success rate is very poor.

已经证明初级精母细胞在显微融入MI卵母细胞后可以完成减数分裂并且产生的胚胎可以发育到期，只是发育率还非常低，作为一种形式的核移植，细胞周期的同步化处理对于胚胎的发育具有重要意义。

Disruption of Sun1 in mice prevents telomere attachment to the nuclear envelope, efficient homologue pairing and synapsis formation in meiosis.

小鼠中Sun1基因的剔除破坏了减数分裂时期端粒的核膜附着，阻碍了同源染色体配对和联会的形成。

The result showed that the plant of Maicao No. 9 was tall, with good fecundity, fully filled grain and vigorous growth. The chromosome number of the root cells was 2n=56, through the observation of pollen mother cells meiosis, there were a certain amount of univalents, ring bivalents and bar bivalents in PMCM. Different numbers of lagging chromosomes, chromosome bridges and micronucleus were found in anaphaseⅠ, anaphaseⅡ and tetraspore.

结果表明：麦草9号植株高大，结实性较好，籽粒饱满，生长旺盛；根尖细胞染色体数目为2n=56，对其进行花粉母细胞减数分裂观察，中期Ⅰ具有一定数量的单价体、环状二价体、棒状二价体；后期Ⅰ、后期Ⅱ与四分体时期都出现不同数量的落后染色体、染色体桥、微核等现象。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。