Genetic testing is a type of medical test that identifies changes in chromosomes, genes, or proteins. Genetic testing can be useful in determining a person's likelihood of developing a genetic disease or in determining the likelihood of developing or transmitting a genetic disease. Geneticists examine your DNA to look for variations in DNA sequences called genetic markers that indicate a person's susceptibility to developing an inherited disease that may run in their family. De-icing whether or not to undergo a genetic test is a personal decision, but it can be a very difficult decision. In a laboratory the scientist will use a process called gel electrophoresis to separate the DNA fragments. DNA is cut into fragments of different sizes as a result of the use of restriction enzymes. DNA fragments of different sizes are arranged and injected onto agarose gel with the addition of a substance that helps it shine after testing. DNA is negatively charged. Electricity produces a positively charged area and a negatively charged area. Opposites attract and as a result the negatively charged DNA will quickly move into the positively charged area. Smaller DNA fragments will run faster than larger DNA fragments. After turning off the electricity, the smaller DNA fragments will be closer to the positively charged area while the larger DNA fragments will be further from the positively charged area. While it's bright, the scientist can take a photo of the data and record the results and compare the DNA samples to look for any anomalies. A genetic test can help a person prepare for the future. For example, if a couple wanted to have children and knew that a disease such as sickle cell anemia runs in the family, they might consider undergoing a genetic test. They would be able to find out whether or not they are...... middle of paper......Web. 17 March 2014. .• "genetic counseling". British School. Encyclopædia Britannica, Inc., 2014. Web. 17 March 2014. .• Trottman, Melanie. “New Workplace Battles: Genetic Testing Creates…” Wall Street Journal. July 23, 2013: page. B.1. SIRS Problem Researcher. Network. March 17, 2014.• Neergaard, Lauran. “Bioethics Committee Urges Greater Gene Privacy Protection.” Indianapolis Star. 11 October 2012: np SIRS Issues Researcher. Network. 17 March 2014.• Educational center on genetic sciences. "Gel electrophoresis". Learn.Genetics March 18, 2014 http://learn.genetics.utah.edu/content/labs/gel/• Fulda, K. G., and K. Lykens. "Abstract." National Center for Biotechnology Information. US National Library of Medicine, 25 August 0005. Web. 18 March. 2014. .