减数分裂的

Cloning of spermatogenesis related genes and further functional study are very important to the elucidation of molecular mechanism involving in spermatogenesis and spermiogenesis process.

克隆睾丸精子发生相关基因并研究其功能，对于揭示精子发生过程中减数分裂和变态的分子机制，对于临床男性不育的诊断和治疗以及男性分子节育等均具有重要的意义。

Based on principle of pollen abortion, utilizing tapetum of anther cell, mitochondria of tapetum, callose well, process of cell meiosis during formation process of pollen, we adopt genetic transformation to create plant male sterility, such as, exogenous cytotoxin gene, chaperones, anti-sense RNA, degradation of callose ahead of time, disturbing information intercommunion between mitochondria and nucleolus and affected development of pollen sporule by bacteria.

根据花粉败育的原理，利用花药细胞绒毡层、绒毡层线粒体、胼胝质壁、细胞减数分裂过程等花粉形成过程中的不同环节，采取外源细胞毒素基因、分子伴侣、反义RNA技术、提早降解胼胝质、扰乱线粒体与细胞核之间的信息交流和细菌影响花粉小孢子发育等策略，使花粉不能正常形成，从而产生不育花粉，达到产生雄性不育的目的。

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。

Meiosis is the most important reproduce and favoured by organisms. The key events of meiosis identified are pairing, synapsis, genetic recombination, segregation.

李丽减数分裂是生物体重要的有性生殖方式，它提供来自母本和父本的基因信息，产生具有生物多样性的子代，使其能够适应环境的变化而不断进化。

Using RAPD fingerprinting, we detected changes in PMCs'genomic DNA in Lilium davidii during prophase Ⅰ. The electrophoresis results revealed a specific polymorphism at synizesis stage, but not at other stages or in somatic cells.

采用RAPD指纹技术对兰州百合减数分裂前期Ⅰ中DNA结构变化的研究表明，在凝线期的花粉母细胞中存在着特异的DNA电泳谱带，在其它时期及体细胞对照中均没有。

N l male gamete transmission of trisomic 2,7,9 had the relation with chromosome behavior at meiosis and with the degression of pollen activity.Besides,n l male gamete fertilization ability and 2n l embryo development ability perhaps could influnce it,too.

6.2号、7号、9号三体n 1雄配子传递率与减数分裂过程中染色体的行为和花粉生活力的降低有关，同时，n 1雄配子受精能力、2n 1胚发育能力可能也会影响n＋l雄配子的传递率。

Monosomic 3, monosomic 5, monosomic 10, trisomic 4 and trisomic 5 as experiment materials, their meiosis behavior of pollen mother cell, pollen characteristics, physiological and biochemical characteristics of anther, section observation of pollen development and the structure of embryo sac were studied, and the effects on the seed set and transmission rate were analyzed.

本文以大白菜同源四倍体小孢子培养产生的且已鉴定为3号单体、5号单体、10号单体、4号初级三体、5号初级三体的非整倍体株系及二倍体株系等为试材，对各材料的结籽率、雄配子传递率进行了统计，并对花粉母细胞减数分裂行为、花粉特性、花粉发育和胚囊结构以及花药生理生化特性等方面进行了观察研究，进而分析了其对大白菜单体n-1雄配子和三体n+1雄配子传递率的影响。

The observation showed that sterile plants and fertile plants in the pollen mother cell stage is not very different, when microspore mother cells of male sterile plants enter meiosis period, it could form normal tetrad cell , tetrad cell is normal in early development stage, In the uninucleate microspore stage , tapetal cells were vacuolization, the microspores were extruded to the middle by tapetal cells.

本研究利用石蜡切片法，结合光学显微镜技术对樱桃萝卜核质互作雄性不育系的不育株和对应保持系可育株的花药发育过程进行细胞形态学观察，观察结果表明：不育株与可育株在花粉母细胞时期差别不大，不育株的花药小孢子母细胞进入减数分裂期后，可以正常的形成四分体，四分体前期发育正常，而在单核小孢子期绒毡层细胞出现液泡化，绒毡层细胞向中间挤压小孢子。

A mutant of Impations balsamina was obtained after space induction, and its traits and meiosis were investigated.

本文报道了种子经神舟 4号飞船搭载的凤仙花突变植株的性状及减数分裂过程的变化。

Whereas, the tapetum of Zhenshan 97A disaggregated at the pollen mother cell stage, the nuclear membrane and the cell membrane disaggregated, the phenomena continued to the binucleate pollen stage. The cytoplasm of the tapetum cells of Zhenshan 97A deposited a few Ca^2＋ precipitates at the pollen mother cell stage.

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^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^2＋沉淀；单核花粉时期绒毡层细胞周围集聚一层Ca^2＋沉淀。

The labia have now been sutured together almost completely.The drains and the Foley catheter come out at the top.

此刻阴唇已经几乎完全的缝在一起了，排除多余淤血体液的管子和Foley导管从顶端冒出来。

To get the business done, I suggest we split the difference in price.

为了做成这笔生意，我建议我们在价格上大家各让一半。