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How DNA Testing Has Changed Everything.

From the time of discovery of DNA testing in the mid 80s, use of DNA in determining relationships and also human identity DNA has emerged out as a vital item in crime investigation and also in the civic world. A relationship and its nature between given individuals can be established using DNA testing. When it comes to identifying individuals body cells whether dead or alive can be used to identify an individual. Human hair can help clarify on what gender the holder belongs to and also tell something on their ethnicity.

Prior the DNA knowledge identification of humans was through blood type. However blood typing was not reliable at all since different individuals could have similar blood type despite the lack of any blood relationship. From the invention of DNA testing all fields have preferred it to other means of identification.

From the invention of DNA testing technique it was revealed that even if there is a blood relationship between people there can never be 100% similarity when it comes to DNA matter since it is unique in every individual. This DNA testing heavily relies on certain unique DNA features called DNA markers. When the patterns from different DNA samples match, then they are likely to come from the same individual. Where the samples are not identical but shows a big percentage of similarity than they most probably come from related individuals. The degree of relatedness between two people is shown by the degree of similarity between their DNA samples.
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Not only in criminal cases that DNA testing can be applied but also on the non-criminal cases or in other words the legal cases. Of the two methods how DNA testing is performed varies from one method to the next. While judging cases from a crime scene where a stain of DNA was collected, it must match that of the suspect to prove them guilty.To prove a suspect guilty in investigation of matters at crime scene DNA stains at crime scene should match those of the suspect. In any cases it is against legal rights of a person to be detained out of non-evident suspicion.
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In legal cases DNA testing is used for child support and by immigration board in monitoring. Where there is no much relevant information that can be used to get the full identity, DNA can be used to determine the degree of relatedness between the finding of the DNA and the documentation at hand. By DNA testing ethnic background of an individual can be determined.

In some parts of the world agencies use DNA in child support to determine real parents of a child for the purposes of providing necessary child care, maintenance and the correct documentation. Such cases present a good example where DNA testing is used legally.

DNA testing also works best when it comes to child adoption practices. In most cases adoption happens on basis of similar ethnicity. DNA testing helps shed light on the ethnicity of a child during adoption.