Written by the Fiveable Content Team • Last updated September 2025
Verified for the 2026 exam
Verified for the 2026 exam•Written by the Fiveable Content Team • Last updated September 2025
Definition
The polymerase chain reaction (PCR) is a laboratory technique used to amplify a specific segment of DNA. It allows researchers to make multiple copies of a particular DNA sequence in order to study it or use it for further experiments.
Related terms
Primers: Short DNA sequences that serve as starting points for the PCR reaction.