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DNA testing was introduced in the 1980s and was compared to the exciting breakthrough of finger print testing one hundred years earlier. Dna, in actual fact, was first isolated by Friedrich Kiescher way back in 1869 but was only developed as a reliable method of genetic finger  printing that distinguishes every living thing as distinct from another. Humans, plants animals all have separate dna’s. Almost all cells in the human body have DNA with the exception of red blood cells; Dna testing can, however, be identified from blood, as well as anything having nucleated cells: saliva, semen and urine for example.

Despite many early contradictions, DNA tests have many important uses, and dependent on the correct conditions being applied, is a trusted method used for such subjects as

·       Crime detection

·       Parentage identification

·       Detection of pedigree in livestock

·       Future likelihood of diseases

Dna stands for Deoxyribonucleic acid, quite a mouthful to say. It is usually extracted by the mouth also, by using a buccal swab which is made of Dacron, due to its smooth and consistent surface which attaches to cells in the cheek. This form of DNA testing has now become routine and kits are available on the open market, although registered laboratories need to be used to obtain results.

In theory, if the DNA in a human body were laid end to end, they would reach the Sun.  Dna can distinguish a person from any other person who has ever lived, even though over 99% of our DNA sequence is the same as other humans. Its uses are still unfolding and the phenomena is seen as a milestone in modern technology.