CRJS478 DB4

Apr 24th, 2015
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DNA fingerprinting is used in other kinds of court cases than criminal cases. Other cases in which DNA profiling is used are custody, paternity, estate settlement, hair analysis, forensic IT, and many more. Because of the information contained in a single sample, it is very important that the same be obtained and maintained in a manner that does not jeopardize the DNA sample. • In 4–6 paragraphs, address the following: o List and discuss the different processes that should be utilized to avoid contamination of DNA fingerprinting samples.  What do you think is the most significant contamination issue with regard to DNA testing? Explain.  What about DNA fingerprinting? Explain.  Provide 2 examples where court decisions have been made directly because of DNA evidence contamination.  How do you feel about the outcomes of these cases? Explain. o How significant is DNA evidence in determining the outcome of modern court cases? Explain in detail.

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CRJS478-DB4NameClassDateProfessorCRJS478-DB4 DNA fingerprinting is a forensic process where like matching a fingerprint to a criminal suspect, DNA is matched to a criminal suspect through the biological sample that is left behind. DNA fingerprinting is used to match children to their fathers or to match a biological profile left at a crime scene to a criminal offender especially in sexual assault cases. DNA profiles can be generated from many different types of biological material. A genetic profile can be generated from blood, hairs, sweat, saliva, semen, skin etc. once a DNA sample is collected it needs to be carefully protected from becoming contaminated. The first step in ensuring DNA samples do not become contaminated is the proper collection. DNA evidence should be collected using standardized collection methods. Each DNA sample should be collected separately with separate instruments. In the lab DNA is vulnerable to contamination by the forensic analyst, DNA from other samples in the lab, and DNA fragments of the allelic ladder used to determine the size of amplified alleles (Lach, 2006). Forensic analyst must change their gloves and clean

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