查询词典 chromosome

Since Watson and Crick have brought forward the model of DNA helix structure and explain about it's reproduce mechanism in molecule level, research work concerning DNA has been continuously lucubrated. However, whether translating inheritance information and rebuilding DNA molecule via menstruating DNA sequence, or to date the most compelling gene project, chromosome protract et. al, there all need a sort of molecule scissors cleaving DNA, DNA cleavage reagent. At present, tool enzyme of cleaving DNA is mostly DNA restriction enzymes founded in 70 years, which only cleave DNA at specific 4-8 base pair sequences that are usually palindromic, so this restricts the at very fast speed developing of gene technology at certain extent.

自从Watson和Crick提出DNA的双螺旋结构并对其复制机制在分子水平上进行解释后，使得对DNA的研究不断深入，但无论是通过测定DNA的序列来破译遗传信息、改造DNA分子，还是目前最令人关注的基因工程、染色体绘制等，都需要一种断裂DNA分子的&剪刀&——DNA断裂试剂，目前断裂DNA的工具酶主要是上个世纪70年代发现的DNA限制性内切酶，但所知的Ⅱ型限制性内切酶的DNA序列识别长度较短（约为4～8个碱基对），而且一般要求回文结构，这就给飞速发展的基因工程技术带来一定的限制。

It was found that four infrequent chromosome pericentric inversions,including inv(6),inv(7),inv(10),inv(11),each about 0.14%; Other seven inv(9),about 0.98% among 714 patients.

在714例受检的人中，发现罕见的染色体臂间倒位4例，包括inv(6)、inv(7)、inv(10)、inv(11)，各占总数的0.14%；另外有9例inv(9)，占总数的0.98%。

Another three chromosome pairs showed their signals like pericentric heterochromatin block in the middle of which there was a constriction. The further studies showed there were no prominent FISH signals for this clone on the chromosomes of both O.

进一步研究表明，FISH分析中这一克隆在药用野生稻和玉米都没有明显信号；Southern分析中，药用野生稻和玉米的信号很弱，小麦、大麦、油菜和拟南芥中均未发现明显的信号。

Compared the similarity and difference of distribution of homologous fragments on X and Y, we suggested that the sex chromosomes of spiny eel have evolved from a pair of homologous ancestral chromosomes, and during the evolution, a pericentric inversion might have occurred on the original Y chromosome, and subsequently terminal regional duplication might have followed, eventually resulting in the differentiation and formation of X and Y chromosomes, then the recombinants between sex chromosomes were repressed, so the sex chromosomes could be inherited steadily.

根据X、Y染色体上同源片段的分布的相似和相异，我们对刺鳅性染色体的分化历程进行了推测，即：刺鳅的性染色体起源于一对原始的同源染色体，通过原Y染色体上的一个明显的臂间倒位，以及染色体末端的异染色质成分的扩增，导致原始Y染色体与X染色体在染色体结构上的分化，从而抑制了X、Y性染色体之间的遗传物质的重组交换，为性染色体的稳定遗传奠定了基础。

Additionally, analysis of G-banding patterns for macrochromosomes of them indicated that there was great difference between NO.1 and NO.2 chromosome, which can be explained by the pericentric inversions.

NO.l染色体，家鸡为m型，而鹌鹑为sm型；NO.4、NO.6、NO.8和Z染色体，家鸡分别为sm、sm、m、m型，而鹌鹑全为t型。G带分析结果显示，家鸡和鹌鹑的G带差异主要反映在NO.1、NO.2染色体上，这可能是由於臂间倒位所致。

Individuals with one X and no Y chromosome are phenotypically females but have a group of physical abnormalities including dwarfism and failure of ovarian development known as Turner's syndrome.

含有一个X而无Y染色体的患者表型为女性，但有一组机体异常表现，包括侏儒郑和卵巢不发育，称为Turner综合症。

Two major genes controllinggrain hardness,Pina and Pinb, was located at the short arm of chromosome 5DS.

控制硬度的主效基因Pina 和Pinb 位于染色体5D 短臂上，软质对硬质为显性。

Moreover, the sex difference of male and female Pistacia Vera can be clearly identified through observing chromosome and analyzing karyotype, but the operation of this technique is difficult.

此外，进行染色体压片技术及核型分析可以直接清楚地了解雌雄株的性别差异，但技术难度大。

The difference of male and female Pistacia Vera were compared and analyzed through treating with chemical reagent, surveying the morphology, RAPD techniques, analyzing the chromosome and comparing the band pattern of isoenzyme. The following results and conclusions were drawn:The leaves of male and female Pistacia Vera were treated respectively with chemical reagent. The sexes were identified quickly and efficiently through different color and precipitate reaction among them. The difference is significant.

本文采用化学药剂处理、形态学观察、RAPD技术、染色体压片分析及同工酶谱带分析等方法分别进行了阿月浑子的雌、雄株差异性比较分析，得出如下结论：(1)采用化学药剂分别处理阿月浑子雌雄株叶部提取液，通过不同的颜色反应和沉淀反应可以快速而有效地鉴别雌雄株，并且差异显著。

Besides chromosome DNA, has extremely few structure different DNA to exist in eukaryotic cell's line plastochondria and the chloroplast.

除染色体DNA外，有极少量结构不同的DNA存在于真核细胞的线粒体和叶绿体中。

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！