Polymerase Chain Reaction

laboratory technique used to replicate segments of DNA by repeatedly splitting the DNA strands and duplicating them with a DNA polymerase enzyme, PCR (Molecular Biology)

The polymerase chain reaction (PCR) is a biochemistry and molecular biology technique for exponentially amplifying a fragment of DNA, via enzymatic replication, without using a living organism (such as E. coli or yeast). PCR can be used for amplification of a single or few copies of a piece of DNA across several orders of magnitude, generating millions or more copies of the DNA piece. As PCR is an in vitro technique, it can be performed without restrictions on the form of DNA, and it can be extensively modified to perform a wide array of genetic manipulations.
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Polymerase chain reaction n. Abbr. PCR A technique for amplifying DNA sequences in vitro by separating the DNA into two strands and incubating it [more]Polymerase chain reaction - Community and Resources

A key technique in molecular genetics that permits the analysis of any short sequence of RNA or DNA without having to clone it.

PCR. A laboratory method used to make many copies of a specific DNA sequence.