Exercise 4 DNA Isolation Forensics Worksheet Name Leah Gray Date Lab Section 41085 10 22 13 1 Sketch the patterns of DNA fragments that you observed on your gel Be sure to identify which sample is in each lane 2 Is there a match between any of the suspects and the DNA collected at the crime scene Based on this limited amount of information who do you think might have killed Jessica Do you have enough information to convict a suspect Why or why not There is similarities between the DNA collected and suspect 2 This is not enough information to convict a suspect due to other circumstances that need to be identified and more detailed samples 3 DNA fingerprinting permits subtle differences between individuals to be identified at the genetic level Two applications that demonstrate how DNA fingerprinting is useful include paternity testing as well as forensic science Go to the following website and explore the DNA Criminal Justice link https koshland science museum org sites all exhibits exhibitdna index jsp How can the FBI CODIS system be used to identify or exonerate a suspect in a criminal case When two DNA samples match completely in a large number of regions such as the 13 used in the FBI s CODIS system the probability that they could have come from two unrelated people is virtually zero This fact makes DNA identification extremely reliable
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