Hello,

In simple terms its a technique used to amplify, or make many copies of, a specific target region of DNA.This DNA region can be anything the experimenter is interested in. For example, it might be a gene whose function a researcher wants to understand.

Hope it helps

Hello

Polymerase chain reaction is a method widely used in molecular biology to make several copies of a specific DNA segment. Using PCR, copies of DNA sequences are exponentially amplified to generate thousands to millions of more copies of that particular DNA segment