Polymerase Chain Reaction

The polymerase chain reaction (PCR) is a method of specifically amplifying a chosen region of DNA (the DNA target). Initially, there may be only a few copies of the chosen base sequence of interest, but after PCR there will be millions of copies of this sequence.

For an explanation of the polymerase chain reaction (PCR) look at the PCR animation. (N.B. When you open the animation choose to run it from it's current location and click yes at the next option).