PCR -PCR replicates (or amplifies) the DNA many times so that a large enough sample can be analyzed.

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Presentation transcript:

PCR -PCR replicates (or amplifies) the DNA many times so that a large enough sample can be analyzed

PCR -to begin, heat is used to separate (or denature) the DNA strands -afterwards, the sampled is cooled to attach the first bases (or anneal primer) to DNA strands

PCR -Lastly, the sample is heated again to continue adding more bases (or extension) -This cycle is repeated over and over again until there is enough of the DNA sample to analyze

DNA Extraction Review Directions: 1. In order to get to the DNA, what needs to be done to the cell? 2. What needs to be done in order to be able to examine the DNA? 3. How does PCR work?