染色体

The influences of different pretreatment time (1. 5, 2. 0 and 3. 0 h), different fixation time (18.0, 21.0 and 24.0 h) and different dyeing solutions (acetate-carmine and basic fuchsin dyeing solutions) on the sectioning effect of chromosome from root-tip cells of onion were studied and compared.

研究比较了不同的预处理时间(1.5、2.0、3.0 h)、不同固定时间(18.0、21.0、24.0 h)、不同的染液（醋酸洋红染液、碱性品红染液）对洋葱根尖细胞染色体制片效果的影响。

MATERIALS AND METHODS: The root tips of Vicia faba were treated with different concentrations of sodium sulfite and sodium nitrite (in the concentrations of 25;50;100;200;400 mg/L) with distilled water as control for four hours.The root tips of Vicia faba were stained with carbol fuchsin and examined. The micronucleus rate and the rate of chromosome aberration were determined within root tip cells of Vicia faba.

材料与方法：用不同浓度的亚硫酸钠和亚硝酸钠(25、50、100、 200、400 mg/L)分别处理蚕豆根尖4 h，并以蒸馏水作为对照，用石炭酸品红染液染色，分别观察、测定蚕豆根尖细胞的微核率和染色体畸变率。

Chromosomes are known from more than 20 families of plants and are also found in some fungi.

染色体在20多科植物和一些真菌中被发现。

At fertilization, when the haploid gamete s fuse, the diploid number of chromosomes is restored.

受精过程中，单倍体配子融合，恢复了二倍体的染色体数目。

Since Fisher's time, it has been realized that genes can sometimes influence the chromosome or gamete in which they find themselves so that the gamete will be more likely to participate in fertilization .

自菲希尔的时代以来，科学家们已意识到，基因有时能影响到它们所存在于其中的染色体或配子，因此，配子将更有可能参与到授精过程中来。

This study provides genetic evidence that SUN1-telomere interaction is essential for telomere dynamic movement and is required for efficient homologous chromosome pairing/synapsis during mammalian gametogenesis.

我们的研究首次从遗传学上证明了SUN1蛋白和端粒的相互作用对于端粒在动物生殖细胞减数分裂中的动态变化，高效的同源染色体配对、联会以及哺乳动物的配子发生是必不可少的。

The other type was somatic meiosis which was analogous to that existed in the process of gametogenesis, and characterized by the pairing and synapsis of homologues chromosomes.

另一种类型是体细胞减数分裂，这种类型类似于大小孢子发生过程的减数分裂，如第一次分裂前期也有染色体的联会和配对。

Genes important for male gametogenesis involved in highly con-served landmark events such as meiotic recombination, formation of the synaptonemal complex, sister chromatid cohesion, spermiogenesis during postmeiotic stages, and checkpoints and factors required for the meiotic cell cycle .

精子发生中的重要基因与一系列精子发生过程中阶段性的细胞事件密切相关，例如减数分裂重组、联会丝复合物的形成、姊妹染色体的结合、减数分裂后精子的变态以及减数分裂周期中的关键点和必需因子等。

Objective To study the genetic effect of balanced chromosomal translocation.

目的 研究染色体平衡易位的遗传效应。

Genetical analysis was made on 1B/1R translocation chromosome of witer wheat strain 73(36)9-1 in this study.

本研究对冬小麦品系73(36)9-1的1B/1R易位染色体进行了遗传分析。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。