How is pcr used in diagnosing cancers?

Molecular diagnosis: Polymer chain reaction PCR is amplification of of a strand of dna ( or rna) establish a sequence making millions of copies thereby helping diagnosis of cancers in early stages, predicting cancer as in braca 1& 11 PCR helps bacteriol & viral infections , and important tool in establishing forensic evidence of a crime.

Amplifying DNA : Pcr is useful for amplifying a dna sample. Molecular analysis can be done with subsequent techniques, such as electrophoresis and dna sequencing.