DNA is a powerful tool for testing the identity of a person or relationship with other person. It is used for both criminal and civil cases. Through DNA testing you can get to know that the two individuals are related to each other or not. Not only this, you can also get an idea about the nature of the person.

The latest advancement in DNA testing is that you can tell the age and gender of the person. DNA is present in every part of your body. You can take it from anywhere weather hair, skin, anywhere. You can accurately test anything about a person. Now people prefer DNA test instead of blood test because it is more accurate.

DNA is a molecule that makes people unique in this world. DNA testing was discovered by Prof. Alec Jeffreys of Leicester University in 1984. At this time the first test was done. When two fingerprints are compared you usually check the loops and whorls of the fingerprints. Same is the case with DNA testing. In DNA testing different features of DNA are compared. These DNA features are called DNA markers.

If you compare two markers you can get three types of results. First one is that the DNA traits are totally matched. Second one is that the DNA traits are not totally matched but some traits are matched and the third one is that the traits are not at all matched. If the traits are totally matched then it is the possibility that they can come from the same person. If the DNA traits are not at all matched then there is no relation between two persons but if the traits are bit similar then there is some relation between two persons.

DNA testing is done for many different cases. The most important two cases are identification between two individuals and the second one is that the stain in the crime scene has to match with the suspect. First time DNA testing was done for non criminal and legal cases like immigration and child support cases. In 2004 more than 7000 DNA tests were taken in UK only to check the relationship.

Using DNA testing you can check the relationship between two persons. It is an unquestionable proof of relatedness. The first time DNA testing was done in a landmark immigration case in 1985. It is Sarbah vs. Home Office case. It is a mother son case in which DNA testing is done to prove the reliability of the relationship between mother and son.

Child Support Agencies also use DNA testing to check who are the mother and father of child. There are many different DNA codes like AATTGCCTTTTAAAAA. Codes are passed on to the child from parents. Everybody has different code.

Everything has been changed just by the discovery of one small thing that is DNA. Now it is very easy to solve the legal and criminal cases.