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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。

A more complicated particle called the chromosome is apparently the fundamental unit of assembly.

一个更复杂的微粒，称为染色质体，显然是包装的基本单位。

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。

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。

An enzyme – telomerase – normally works to repair that damage to the chromosome, Glaser said.

一种酶-端粒酶-通常工程，以修复，破坏染色体，格拉斯表示。

"Telomeres are like caps on the chromosome," said Glaser, head of Ohio State's Institute for Behavioral Medicine Research.

"端粒是如caps对染色体，"格拉斯说，头部的俄亥俄州立的研究所行为医学研究。

Human X chromosome shrot arm Xp11.3~p21.3 is an area, where several genetic disease gne loci are located.

人类 X染色体短臂11.3-21.3区是含有视网膜色素变性等数种遗传病基因位点的区域。

The application of the RFLP technique in the plant genetie and breeding were summarized in follwing six aspects: lThe construction of linkage genetic maps; 2The application of RFLP Linkage genetic maps in the graminaceous crops;.3Following the tracks and appraisal of the chromosome or.its fragment analyses of the systemtic development; 4The research of the quantitative trait inherit...

本文介绍了RFLP技术的原理及特点，并从六个方面综述了国内外RFLP技术在植物遗传育种中的应用：（1）连锁遗传图谱的构建；（2）RFLP连锁遗传因在禾本科植物中的应用，（3）跟踪、鉴定染色体或其片段、分析系统发育；（4）数量性状遗传的研究；（5）优良性状及抗性材料的筛选；（6）种质资源遗传多样性的研究。

She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了，但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

要是在劳改农场，你等着挨绳子吧！