例句與造句

1. Analysis of mtdna cyt b gene sequence polymorphism in qinchuan cattle
   基因序列多態(tài)性分析
2. Rapd ( random amplified polymorphic dna ) , which bases on the polymerase chain reaction ( pcr ) , is by far one of the most commonly molecular techniques to uncover dna sequence polymorphisms . the basic priciple of this technique is that an arbitrary primer ( usually lobp oligonudetide ) is used to amplify random segments of dna , and a small number of fragments will be amplified when the primer anneals on each strand over a length range . if sequence variation is present at the priming site , then a fragment may not be amplied , so the dna polymorphic can be detected
   Rapd (隨機(jī)擴(kuò)增多態(tài)性dna )技術(shù)是二十世紀(jì)90年代發(fā)展起來的一項(xiàng)dna分子多態(tài)性檢測技術(shù)，它建立于聚合酶鏈?zhǔn)椒磻?yīng)( pcr )技術(shù)基礎(chǔ)之上，利用隨機(jī)合成的寡聚核苷酸序列為引物(一般為10個(gè)bp ) ，分別與dna的兩條單鏈結(jié)合，在dna聚合酶的作用下，對基因組的特定區(qū)域進(jìn)行pcr擴(kuò)增，其電泳結(jié)果為不同大小和數(shù)目的dna譜帶即rapd圖譜，可反映基因組相應(yīng)區(qū)域的dna多態(tài)性。
3. It's difficult to find sequence polymorphism in a sentence. 用sequence polymorphism造句挺難的