Polymerase chain reaction 32 Polymerase Chain Reaction 7 Laboratory manuals 5 methods 5 Analysis 4 DNA polymerases 3 Diagnostic use 3 Genetic Engineering 3 Molecular cloning 3 Molecular genetics 3 Nucleic Acids 3 Nucleic acids 3 Proteins 3 analysis 3 Biochemistry 2 Biotechnology 2 Cattle 2 DNA fingerprinting 2 Diagnosis 2 Diagnosis of Animal Diseases, (New March 2000) 2 Diagnostic techniques 2 Disease control 2 Disease prevalence 2 Disease prevention 2 Enzymes 2 Epidemiology 2 Field Crops, (New March 2000) 2 Gene cloning 2 Gene expression 2 Gene mapping 2