DNA profiling

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DNA profiling has been one of the biggest advances in technology and science in the 20th century due to its efficiency in the identification of individuals. It is commonly used by forensics scientist for identification of suspects or individuals in crime scenes. DNA profiling as it is today, was developed by two independent studies in molecular biology that occur during the same period of time, in two different places, and by two different scientists. In 1985, Alec Jeffreys developed a technique called DNA fingerprinting, which has been known as DNA profiling. And Kary Mullis invented the polymerase chain reaction which is a biochemical technology in molecular biology used to amplify one single sample of DNA across many orders of magnitude generating millions of copies of an specific DNA sample. Modern DNA profiling is called STR, which is a very sensitive technique that help CSI's to identify criminals. It is the process where a specific DNA pattern is obtained from a person or sample of any bodily tissue. The typical patterns of genetic profiles are produced by electrophoresis of treated samples of DNA. This patterns may be called fingerprints. In criminal investigations, there are tested about 10 sites of the DNA. If the banding patterns produced by the tested DNA samples of a suspect in a crime, and the samples taken from the crime scene are the same, it is enough evidence for convicting a suspect and taking him to jail. The 99% of human DNA is exactly the same for all the people, even though, a single droplet of blood, or an eyelash collected in a crime scene, contains all the genetic information needed of every single person in the world, to convict a criminal. DNA profiling has have a huge impact in many things, from the... ... middle of paper ... ...: http://www.brighthub.com/science/genetics/articles/65420.aspx [Accessed: 31 Mar 2014]. Freeman, S. (2014). HowStuffWorks "How DNA Profiling Works". [online] Retrieved from: http://science.howstuffworks.com/dna-profiling.htm [Accessed: 31 Mar 2014]. Grow - Wisconsin's Magazine for the Life Sciences. (2011). How DNA Profiling Works. [online] Retrieved from: http://grow.cals.wisc.edu/health/how-dna-profiling-works [Accessed: 31 Mar 2014]. Museum, S. (2014). What is DNA profiling?. [online] Retrieved from: http://www.sciencemuseum.org.uk/whoami/findoutmore/yourgenes/whydoscientistsstudygenes/whatisdnaprofiling.aspx [Accessed: 31 Mar 2014]. Oak, M. (2014). Top Ten Scientific Discoveries of the 20th Century. [online] Retrieved from: http://www.buzzle.com/articles/scientific-achievements-top-ten-scientific-discoveries-of-the-20th-century.html [Accessed: 31 Mar 2014].

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