DNA blood testing is the ultimate proof in many courtrooms from all around the world. The huge discovery and/or invention DNA blood testing represents is extremely important and is one of the most important topics in the medical and scientific communities. In order to understand better what DNA blood testing really is, we have gathered some helpful information. Let’s begin by explaining what DNA is. DNA is deoxyribonucleic acid and it can be found in every cell of the human body. This acid practically determines the physical qualities of a person – the height, the color of the skin, the color of the eyes and of the hair, everything. Every person has a different fingerprint, which makes him unique. DNA is also unique. It can be easily compared with a signature, this is why DNA blood testing is used mostly at crime scenes in order to identify the person who committed a crime.
Obviously, the DNA blood testing is not used only to identify murderers, but also to prove the paternity of a certain person. Even if DNA lies in every single cell of the body, blood samples contain more of this acid. This is why DNA blood testing is preferred. Skin may be contaminated and saliva samples can be influenced by food. DNA blood testing is the safest, as the blood comes from inside the body and samples are harder to be ruined because of this specific reason.
How does the DNA blood testing work? Experts take samples of blood from the person they want to test and they examine it. If the DNA blood testing is used at a crime scene, the sample of blood of the suspect will be compared with a DNA sample found at the crime scene, to check if that person can be placed there when the murder took place. In present, only DNA blood testing is really safe. Other samples can be damaged by exterior factors like wind, heat or liquids. The passing of time also makes testing difficult. That is why DNA blood testing for a crime scene is not the only proof needed in order to convict someone, but is only a part of the whole process of identification of the murderer.