The term for the technique used to amplify DNA is called polymerase chain reaction (PCR). PCR is a widely used molecular biology technique that allows scientists to make millions of copies of a specific DNA sequence. This amplification is achieved through a series of temperature changes that facilitate denaturation, annealing, and extension of the DNA template. PCR is essential for numerous applications, including genetic testing, forensic analysis, and research in genomics. Its ability to generate large quantities of DNA from a small sample has revolutionized many biological fields.