Polymerase chain reaction (PCR) enables researchers to produce millions of copies of a specific DNA sequence in approximately two hours. This automated process bypasses the need to use bacteria for amplifying DNA.
Image of Kary Mullis. In 1985, Kary Mullis invented the polymerase chain reaction (PCR), a method of amplifying or producing many copies of a specific piece of DNA. The revelation came to this eccentric character on a drive in northern California.
A technician uses a computer guiding system to align the filter mask in perfect register with the quartz wafer. The filter mask will block light to selected regions of the wafer. More nucleotides can be added to the exposed regions.