MCB Dissicussion Assignment 3

MCB Dissicussion Assignment 3 - 1. The most widely used...

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1. The most widely used type of DNA testing in practice today is polymerase chain reaction or PCR. The process of PCR involves taking a small sample of the DNA and replicating it millions of times. This process, which is called PCR amplification, creates enough DNA for a laboratory analyst to analyze several different DNA loci (up to 13) and create a DNA profile which can then be matched to the victim or assailant. PCR has greatly improved the uses of DNA testing in forensic labs. This is because many older DNA samples couldn’t be tested, because they were either too small or parts of the DNA were contaminated, but PCR allows the DNA to be tested with a lot smaller piece, degraded, or old DNA. This has greatly increased the success rate of DNA testing, allowed many “cold cases” to be resolved, and proven “guilty” criminals innocent. 2. Contamination is when DNA from another source gets mixed with the DNA that is trying to be analyzed. This makes it impossible for accurate results, because you cannot tell what part of the DNA is from which person. Contamination of the evidence can occur very easily. All it takes is for someone to sneeze, cough, or even touch the material (without proper equipment) for it to
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MCB Dissicussion Assignment 3 - 1. The most widely used...

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