Forensic DNA Fingerprinting

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Forensic DNA Fingerprinting

  1. 1. DNA Profiling When a crime occurs, forensics take actions to know who was the guilty of the victim. Inorder to do this, they use a technique known as DNA Profiling. It consists of collecting differentsamples of blood, hair, saliva, semen, and body tissues in the crime scene, and also from thesuspects. Then, the DNA is extracted from the cells of these samples to use it in PCR. In forensicPCR, it is used restriction enzymes indeed of polymers to cut at different places of the DNA. In anagarose gel the DNA fragments are run, and then the pattern of their distribution is analyzed. Wepracticed DNA Profiling, using samples of the crime scene and from 5 suspects. We used theprocess of gel electrophoresis and looked at the distribution pattern of the DNA fragments. It wasobserved that the fourth suspect showed a fragment of the same size and thickness, and thedistance between the bases was also the same as compared to a crime scene fragment.

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