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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.
