BIOL 1010 Lecture Notes - Lecture 9: Heteroplasmy, Combined Dna Index System, Kary Mullis
21 Dec 2017
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Convicted felon dna databases: explain the locard exchange principle. Dna therefore not ideal for forensic evidence which typically has small degraded samples. Restriction enzymes cut dna whenever they encounter a specific dna sequence. Gel electrophoresis separates the fragments of dna according to their length. Rflp-based dna finger printing has been replaced by pcr-based dna fingerprinting- polymerase chain. It amplifies short specific regions of dna, is an in vitro technique that can yield millions of copies of desired dna. A method of identifying an individual by unique characteristics of that persons dna. Short sequences of dna usually 2-5 base pairs long that repeat many times. A database of dna profiles from violent felons and crime scene samples. If the victim is female, the perpetrators dna may be hard to amply over the victim. Single cell sensitivity because each cell contains thousands of mitochondria. Useful for shed hairs and burnt remains.
