Background for PCR: DNA is the recipe cells use to create and sustain life. A location on a strand of DNA is called the gene locus and the different variations of the gene are called alleles. So a designated parking spot would be similar to the gene locus and the car parked there would be akin to an allele. If scientists want to study a particular locus in a set of samples, polymerase chain reaction (PCR) can be used to produce multiple copies of a specific region. The basic steps to PCR: First, the sample's DNA must be mixed with a combination of primers, a buffer, and a special enzyme named Taq that is heat resistant. Then the mix is heated and cooled repetitively to allow the primers and enzyme to create new copies of the DNA in a cycle. When finished, the DNA is multiplied/amplified and can be used for forensics, the detection of viruses, genotyping(observing which samples have which alleles), etc. How PCR will help my project: I learned PCR this summer because we have used i