PCR

Polymerase Chain Reaction (PCR) is a laboratory technique used to make millions of copies of a specific DNA segment. It involves repeatedly heating and cooling a sample to separate the DNA strands, then adding short pieces called primers that attach to the target sequence. An enzyme called DNA polymerase then synthesizes new DNA strands from the primers. This cycle is repeated multiple times, exponentially amplifying the target DNA. PCR is widely used in genetic testing, forensic analysis, and medical diagnostics to quickly analyze small amounts of DNA.