Chinese scientists who analyzed the dna of the remains say the man , named yu hong , belonged to one of the oldest genetic group from western eurasia 做出骸骨dna分析的中国科学家声称，这名名叫于洪的男子属于最古老的西欧亚古人类部落的一支。
Arguably , these laws do not cover dna analysis methods introduced after their passage , and the defense may still challenge laboratory performance and the statistical interpretation of results 有争议的是，这些法律都没有包含dna分析方法，被告仍旧可以挑战实验室的工作和结果的统计解释。
The tailed primer design protocol is feasible for y - str loci and can be used to develop more multiplex pcr assays of y - str loci . the results of validation prove that the y - a489 - plex multiplex pcr system can be accepted for the forensic dna typing 证明y一a489一plex ，适合于法医dna分析，有较高的应用价值，为法医y染色体分型提供了新的技术手段。
Furthermore , the home product of taq dna polymerase had the same specificity and efficiency compared to the amplitaq gold ( pe , usa ) in this study . conclusion this is the first time that the tailed primer design protocol for multiplex pcr system is used for y - str loci 初步构建了四个y一str基因座的y一a489一plex银染体系和y一a4sg一plex荧光体系:并依据dna分析技术工作组( twgdam )指南进行了应用性研究。
Randomly amplified polymorphic dna ( rapd ) is a common method to analyze dna , and is based on pcr using a series of primers made up of randomly arranged basesalthough the sites detected by a single primer are limited , the entire genome can be inspected when many primers were used 随机扩增多态性dna ( random amplified polymorphic dna ， rapd )技术是?种dna分析的常用方法，其原理是采用一系列碱基顺序随机排列的引物对所研究物种的dna进行pcr扩增。
This study did microinjection to kunming white mouse inbred embryos to test its in vitro developmental ability , then pluripotency of porcine eg cells was tested with production of chimera by blastocyst injection . finally , first chimeric pig in china was delivered , and by chimera analysis , chimerism is present in some tissues 本研究首先利用近交系昆明白小鼠进行胚胎显微注射观察发育效果，然后利用所获五指山猪eg细胞制作嵌合体检验eg细胞多能性，最终获得国内首例胚胎干细胞( eg细胞)嵌合体猪，经dna分析确认在多种组织中存在嵌合状态。
A series of validation experiments and genetic studies should be performed for the y - str multiplex system according to the suggestion of the technical work group dna analysis methods ( twgdam ) . method we selected four y - str loci , dys434 , dys438 , dys439 , a10 ( y - gata - a10 ) and designed two set of tailed primers to improve the efficiency of the multiplex pcr 方法选定四个y染色体str基因座，应用加尾序列引物设计策略设计的引物，构建四个基因座的y - str复合扩增体系，建立银染检测和荧光检测方法，依据dna分析技术工作组( twgdam )指南进行法医学可行性研究和群体遗传研究。
The purposes of our work are to establish a simplified method of multiplex pcr based on chimeric primers for str loci , to develop a set of fluorescent quadriplex str system for forensic dna typing based on this method , and to validate the forensic application of the system under the guidelines of tmgdam ( the technology working group on dna analysis methods ) in order to address concerns presented in today ' s legal environment 目的本课题旨在探索一种新的str基因座复合扩增方法，我们称为嵌合引物str复合扩增法。应用荧光标记毛细管电泳激光自动检测技术平台，建立一套新的法医str基因座复合扩增体系，并按照美国dna分析方法技术工作组( thetechnologyworkinggroupondnaanalysismethods ， twgdam )的指导方案进行法医学实用性研究。
After dna analysis , six white pigs is not present chimerism in various tissues . to one skin pigment piglet , chimerism is present in skin , brain , pancreas , pituitary gland and blood , but not in heart , lung , liver , spleen , kidney , intestine and ovary . the detection of another skin - pigment chimera is similar to the analysis result of wzsp 通过dna分析进一步得出，所产8头仔猪，其中六头白猪体组织未发现嵌合现象；其中一头皮肤色素嵌合体猪的皮肤、大脑、胰、甲状腺、血是嵌合的，而心、肺、肝、脾、肾、空肠、卵巢这些组织并没有嵌合；另一头皮肤色素嵌合体猪的检测结果和五指山猪取得相似的结果。
