Audience - passed through the gel. Negatively charge DNA...

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Audience : College graduates who have a background in biology, or a degree in it. The intended audience is someone who also has been just hired to work at a crime lab. Introduction Gel electrophoresis is a simple process that can be utilized to analyze ones DNA (Deoxyribonucleic Acid). Particles/fragments of DNA are separated by both size and electrical charge, positive or negative. In the process of gel electrophoresis fragments of DNA are separated from each other by passing and electrical current through a sample of agarose gel. Inside the agarose gel, DNA samples which are extracted from a person’s hair for instance, are inserted into small compartments called wells. The sample of gel containing DNA is set up to a gel electrophoresis apparatus. The apparatus contains one electrical wire that is black and one which is red. The red wire is the cathode or the positively charged end. The black wire is called the anode or the negatively charged end. The two ends are attached to the gel and a current is
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Unformatted text preview: passed through the gel. Negatively charge DNA fragments move to the anode end and positively charged DNA fragments travel to the positively charge end. Since every person on the planet has their own unique sample of DNA, the way the bands are arranged on the agarose gel become a unique fingerprint to that person. In terms of crime, a DNA sample at a crime scene can be used to identify a suspect as the perpetrator since everyones DNA is unique. Gathering Crime Scene Evidence 1. Once the crime scene has been cleared, proceed to collect the biological evidence. Biological evidence includes bodily fluids, blood, and hair. For this gel electrophoresis, hair samples will be used. 2. Hair samples are picked up using tweezers and placed in labeled evidence bad 3. All hair samples are accounted for and delivered to the lab for the extraction of DNA samples....
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