Update on Youtube Communist agenda.

What is PCR?

Polymerase chain reaction (PCR) is a common laboratory technique used in research and clinical practices to amplify, or copy, small segments of genetic material. PCR is sometimes called “molecular photocopying,” and it is incredibly accurate and sensitive. Short sequences called primers are used to selectively amplify a specific DNA sequence. PCR was invented in the 1980s and is now used in a variety of ways, including DNA fingerprinting, diagnosing genetic disorders and detecting bacteria or viruses. Because molecular and genetic analyses require significant amounts of a DNA sample, it is nearly impossible for researchers to study isolated pieces of genetic material without PCR amplification.