DNA testing is the most accurate and reliable genetic analysis
available for parentage testing. However, the accuracy or specificity of the DNA
testing depends on the sample and procedure that the DNA laboratory has
used. Since we utilize the most advanced genetic testing procedure, we are
able to achieve at least specificity of 99.9%. In most cases, DNA
testing will result in specificities of 99.99% or greater.
If DNA patterns between the child and the alleged father do
not match on three or more genetic markers, then the alleged father is excluded
with 100% certainty. That means he can not be the biological father of the child.
There is no test available which can prove with 100%
certainty that a man or woman is the biological parent of a child.
Thus, if the DNA patterns between mother, child
and the alleged father match on the tested DNA markers, the likelihood of
paternity is calculated with the general population of the same ethnic group.
When the likelihood of paternity is greater than 99.9%, the result practically
proves that the alleged father is the biological father of the child. Most
courts in the U.S. accept 99.0% as proof of paternity.
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