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Unit 7: DNA - a Forensic Tool

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Mastery Objectives / Critical Thinking Skills

Recount the history of DNA as a forensic tool
Using a diagram, explain the basic structure of DNA, including base pairing.
Explain DNA replication in the context of the polymerase chain reaction (PCR).
Describe small tandem repeats (STRs) and their use as DNA “fingerprints.”
Discuss the role of gel electrophoresis in characterizing the tandem repeat patterns in the DNA of individuals.
Compare and contrast the role of mitochondrial and Y chromosome markers in forensic identification.
Describe CODIS, the type of information it contains, and the methods by which that information is obtained and used.
Using tables and sketches, explain where DNA may be found at a crime scene, the method(s) for collecting it, and the methods for preserving it for analysis.