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Murder, Rape, and DNA Jonathan Degrees February 16, 1997 DNA is the information needed by a cell in order to reproduce an identical offspring. In some crimes detectives have no evidence or fingerprints to tell who had committed a crime. Now there is a way of finding who has committed the crime by a method called DNA Typing. DNA Typing is finding bacteria or blood on clothing or skin and amplifying the gene.
This process was pioneered in the 1980 s by a Scientist named Alec Jeffreys. If blood, sperm, or any other human cells are left at the scene of a crime, the DNA in the cells can be analyzed and compared with some DNA taken from the suspects blood. If they match, this information and testimony of a scientist can be used to convict a rapist or murderer. In the O. J. Simpson case DNA Typing was used.
There was blood found on various areas at the crime scene. The investigators gathered the evidence, and took it to the laboratory where it was analyzed. The jury determined that the samples were contaminated because of the way they were handled. DNA Typing is not perfect. There are many loop holes in it. An example is the O.
J. Simpson trial. During the process the DNA may be tampered with or damaged. In most rape cases DNA Typing is used by taking semen off the body of clothes then amplifying the genes. The machine that copies the DNA is called the PCR. The DNA is then cut and placed the wells in trays.
PCR copies the small pieces of DNA. It is performed by a blotting process. This process has 21 different categories. Other tests include those for tracing genetic diseases within families, finding the genes that cause genetic diseases.
DNA Typing can also prove the relationship with families. DNA Typing is becoming more common than ever. This process is helping to free convicted people of crimes they may not have committed by taking samples of the prisoners DNA and comparing it with the evidence left at the crime scene.
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Research essay sample on O J Simpson Genetic Diseases
