How to DNA Test

Best DNA test operating procedures will reduce the risk of a contaminated result, no matter what the purpose of the initial test. DNA tests have been in commercial operation for a quarter of a century now, and their techniques are still evolving. The purposes to which these tests can be put vary greatly, from the very serious matter of trying to find out who committed a capital crime, to the seemingly mundane issue of who is the biological father of a child. This technology continues to evolve, but it is important to understand the inherent limitations right from the start.

In criminal detection cases, the best DNA test will be the one which reduces the risk of a false result due to contamination to the lowest possible level. Problems occur in criminal cases because scientists are often dealing with samples which were not given voluntarily, but which were extracted from items or body tissue left at a crime scene. It is virtually certain that the opposition in a criminal trial will try to suggest that the test results are false, so it is vital to be able to back up your testing procedures with evidence.

In the case of a paternity suit, it is far more likely that the samples will be clear and the case easily solved. Because of the way that certain strands of DNA are passed from the father and mother, the DNA of close blood relatives will usually be very similar. If the samples are taken properly, and the test carried out according to sound laboratory practices, the result should be clear enough. Paternity suits are becoming an increasingly common way of using DNA evidence.

Because of the close DNA matches produced by close members of the same family, DNA testing is now being adopted for other legal purposes. Where there is a will, for example, which is being challenged on the basis of someone not being a blood relative, that fact can be clearly ascertained by a simple test. This is easier to carry out if all relevant parties are willing to give samples under controlled laboratory conditions, but even where this is not the case the DNA of known relatives who are willing to give samples can be tested.

Whatever the purpose of the procedure, the best DNA test will be the one which protects the integrity of the test to the highest degree, and which provides proof of this to be used in any court case. It is not enough to do the right thing, it is essential to be seen to be doing the right thing. Many court battles are lost because there is enough of a doubt remaining for the DNA evidence to be totally disregarded. This has become even more so with the latest questionable magnification techniques. Make sure your evidence is clear and provable, and you will have carried out the best DNA test.

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