Introduction - If you have any usage issues, please Google them yourself
Polymerase chain reaction (PCR) is a molecular biological technology used to amplify and amplify specific DNA fragments. It can be regarded as a special DNA replication in vitro. The greatest feature of PCR is that it can significantly increase the amount of DNA. Therefore, no matter fossil remains or fossils of historical figures, or the hair, skin or blood left behind by murderers decades ago, if we can isolate a tiny amount of DNA, we can enlarge and compare them with PCR. This is also the power of "trace evidence". It was first proposed by American Mullis in 1983 that the polymerase chain reaction (PCR), the simple DNA amplification method, was invented in 1985, which means the real birth of PCR technology. By the year 2013, PCR has developed to the third generation of technology. In 1973, Qian Jiayun, a Taiwan scientist, found a stable Taq DNA polymerase that also made a basic contribution to the development of PCR technology.