Real-Time Polymerase Chain Reaction (RT-PCR) uses nanoscaled fluorescent probes that allow the tracking of the progress of the amplification from the start.

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Ms. Dewey-Hagborg amplifies small DNA strands using a technique called PCR polymerase chain reaction.

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For years, he had been making the case that polymerase chain reaction (PCR) would be the best way to test for the existence of Earth-like DNA on Mars.

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