The DNA stores our unique genetic information. DNA analyses allow us to determine whether persons are biologically related or not..
DNA (Desoxyribonucleic Acid) is a molecule that contains our unique genetic code. This code can be found inside each cell and is passed on from the parents to every child.
Children therefore get half of their DNA from their mother and half from their father. But while children inherit 50 : 50 % of their parent's genetic material, the combination of this material differs from sibling to sibling. That is what makes sibling similar but not identical.
Paternity testing is based on the fact of inherited DNA. Hence, if we test the DNA samples of a child and an alleged father, we look for similarities in their DNA. The statistical outcome of such a test is up to 99,99999% accuracy in the test results.).