The polymerase chain reaction.
The polymerase chain reaction (PCR) is a powerful new method for 'in vitro cloning'. It can selectively amplify a single molecule of template DNA several millionfold in a few hours and has made possible new approaches to problems in molecular genetics, evolutionary biology, and development.
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Arnheim
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D005075:Biological Evolution; D002454:Cell Differentiation; D003001:Cloning, Molecular / Q000379:methods; D004259:DNA-Directed DNA Polymerase / Q000378:metabolism*; D005554:Forensic Medicine; D005823:Genetics; D006801:Humans; D021141:Nucleic Acid Amplification Techniques; D019914:Taq Polymerase
D019914:Taq Polymerase; D004259:DNA-Directed DNA Polymerase