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An introduction to the importance of dna evidence in todays society

Crime Scene Investigation" routinely draws more than 20 million viewers per episode, making it one of television's greatest successes.

The Importance of DNA

The show's popularity owes a great deal to the writers and actors who bring the stories to life. But another intriguing element is the cutting-edge technology used by the Las Vegas crime lab trying to solve crimes.

  • Avi - 2-Jan-17 4;
  • Nonmonetary Costs and Benefits The ethical perspective by which actions or practices are evaluated in terms of their good and bad consequences is fundamentally sound;
  • Therefore, a critical step in accepting the use of DNA technology in criminal trials is establishing safeguards and seeking to prevent abuses;
  • The efficacy and accuracy of a new technology typically are initially demonstrated by the most highly competent and knowledgeable practitioners.

Collecting and analyzing DNA evidence tops the list of the lab's forensic toolkit, and its ubiquity in shows like "CSI" and "Cold Case" has increased public awareness to the point that many jurors in real-world courtrooms expect to see DNA evidence presented -- whether a case calls for it or not. It's hard to believe that DNA evidence has come so far so fast. The techniques that make it possible to identify a suspect using his or her unique genetic blueprint have only been around since 1985.

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That's when Alec Jeffreys and his colleagues in England first demonstrated the use of DNA in a criminal investigation. Since then, DNA evidence has played a bigger and bigger role in many nations' criminal justice systems. It has been used to prove that suspects were involved in crimes and to free people who were wrongly convicted.

Can DNA Demand a Verdict?

And, in the United Statesit has been integral to several high-profile criminal cases. At the heart of DNA evidence is the biological molecule itself, which serves as an instruction manual and blueprint for everything in your body see How Cells Work for details. A DNA molecule is a long, twisting chain known as a double helix.

  • Unwarranted expectations about the power of DNA technology might result in the exclusion of relevant evidence;
  • At the heart of DNA evidence is the biological molecule itself, which serves as an instruction manual and blueprint for everything in your body see How Cells Work for details;
  • The proliferation of DNA evidence in investigations and trials requires a fairly rapid expansion in the number of reliable experts and laboratories;
  • Fingerprints are easily detected and developed, and large electronic fingerprint databanks exist all over the world;
  • Both prosecutors and defense counsel are entitled to benefit from the power of DNA evidence, but they should not oversell it;
  • Rarely do fingerprint experts differ in conclusions reached after examination of fingerprint evidence.

DNA looks pretty complex, but it's really made of only four nucleotides: Adenine Guanine Thymine These nucleotides exist as base pairs that link together like the rungs in a ladder. Adenine and thymine always bond together as a pair, and cytosine and guanine bond together as a pair.

  1. Even well-done tests can yield false positives. Mere cross examination by a defense attorney inexperienced in the science of DNA testing will not be sufficient.
  2. The project uses DNA profiling evidence to support the re-evaluation of criminal cases.
  3. The victim is confined to an institution where access is limited to relatively few male attendants.
  4. Should this be seen as similar to a "frisk" or a simple search that requires a warrant or as an intrusion into someone's body that requires a strong showing of need?

In human cellsDNA is tightly wrapped into 23 pairs of chromosomes. One member of each chromosomal pair comes from your mother, and the other comes from your father. Unless you have an identical twin, your DNA is unique to you. This is what makes DNA evidence so valuable in investigations -- it's almost impossible for someone else to have DNA that is identical to yours. But catching a criminal using DNA evidence is not quite as easy as "CSI" makes it seem, as this article will demonstrate.

How DNA Evidence Works

Our first step in exploring DNA evidence is the crime scene -- and the biological evidence gathered there by detectives.