The PCR method can be used for reduplicating a segment of a DNA molecule,e.g.from a blood sample.The procedure is repeated 20-60 times,which can give millions of DNA copies in a few hours. ing.The stat yesisof ew DNA te help of the DNA Polymerase enzyme. 一New DNA strands are formed,which in tum can reduplicate 2----- replic PDF文件使用"pdfFactory Pro'”试用版本创建um,fineprint.com,cn The PCR method can be used for reduplicating a segment of a DNA molecule, e.g. from a blood sample. The procedure is repeated 20-60 times, which can give millions of DNA copies in a few hours. PDF 文件使用 "pdfFactory Pro" 试用版本创建 ÿwww.fineprint.com.cn