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How Useful DNA Testing Can Be. History of DNA testing is rated approximately #% years ago, it has been used in human identification and establishing relationships present among different individuals. DNA testing helps determine if there is a relationship between given individuals and also aids in determining what kind of relationship is there. When it comes to identifying individuals body cells whether dead or alive can be used to identify an individual. Even body parts made of continuous dead cells like hair can be used to tell gender and ethnic background of an individual. Before indent of DNA testing, identification …