What does polymerase chain reaction (PCR) do?

Polymerase chain reaction (PCR) represents the replication (transcription, amplification) of DNA molecules in vitro.

Explanation:

DNA replication by polymerase chain reaction (PCR)  is based on the hybridization of specific oligonucleotides (primers) and in vitro synthesis of copies of an iron fragment that is fringed and labeled with the primers. Such amplification was followed by agarose gel electrophoresis and suggesting a common application of PCR for species identification.

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