Dna Technology

The advent of desoxyribonucleic acid technology has revolutionized the way law enforcement conducts condemnable investigation . This scientific approach is today s most potent tool in solving offenses . desoxyribonucleic acid (Deoxyribonucleic Acid analytic thinking is very much similar to fingerprinting but instead of studying finger or foot prints found in the crime opinion samples of biological presents such as tomentum , skin cells , semen , spit and other bodily fluids be collected and examined in laboratories to identify workable suspects . DNA evidence empennage directly link or eliminate suspects from the crime . Many unsolved crimes and cold cases have already been opinionated with the use of this powerful investigative technique . DNA is the primal building block for an individual s entire transmittable war paint . It is a component of virtually every cell in the human body , and a individual s DNA is the analogous in every cell . That is , the DNA in a person s blood is the same as the DNA in his skin cells , saliva , and other biological material (NIJ , 2002 ,. 5DNA carries a molecule containing genetic identity code that makes a person distinct from the other except for identical twins . The puzzle out is very complex but recent developments in DNA technology have further strengthened the capabilities of investigators in evaluating crimes no matter how small the evidences are or invisible to the stark naked eye . There are different techniques used in analyzing DNA . There is the Restriction Fragment Length pleomorphism (RFLP ) that detects DNA variation in the form of different coat fragments where a sequence is produced through an autoradiograph , which looks like a measuring stick code . For distributively sample taken from the crime scene and suspect , a DNA is extracted from the same chromosomal persona and arranged in sequence through a consider of repeats Every person has a diverse number of repeats of a sequence in his /her DNA .

This is called Variable Number tandem Repeats , an area of the DNA that does non contain any genetic traits but produces a distinct length of the number of repeats . The final result is an x-ray like photograph revealing the lengths of each DNA and if there is an identical pattern a possible suspect is identified . Most sequences are positioned adjacent to each other so that comparison would be easy as shown in the illustration where the length of number of repeats of suspect 2 is the same level as that of the crime scene . still , this approach requires large quantity of DNA samples and if the samples are vitiated or not well preserved RFLP may not work successfullyAnother method is called Polymerase Chain Reaction (PRC ) that magnifies and identifies DNA in very small samples of biological evidences . PCR can replicate the DNA in one cell multi-million fold even if it is comfortably degraded . This means that smaller more degraded samples can be used and that non-intimate body samples such as saliva and hair which can be acquired less invasively from suspects could be more easily analyzed (Easteal Easteal , 1990 ,. 2 . This...If you want to get a full essay, order it on our website: Ordercustompaper.com

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