A paternity index (PI) score of 1 is assigned to each marker that matches the alleged father’sand the child’sDNA profile while a PI score of 0 is assigned to every non-match. The PI is the likelihood ratio that indicates whether the evidence fits better with the hypothesis that the man is the father or with the hypothesis that someone else is the father.
The combined paternity index (CPI) is then computed by multiplying the PIs then converted to a probability of paternity value. The larger the CPI, the more strongly the hypothesis that the alleged father is the true biological father is supported by the genetic evidence. The alleged father is ruled out as the biological father if he does not share a number in common at 3 or more genetic systems. We are also capable of providing further tests and statistical analyses in complicated cases leading to accurate and irrefutable results.
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Samples from the Child and the Alleged Father are needed for the DNA test. It is not a must to send the Mother's sample even though having it may strengthen the DNA results. In the absence of the alleged father, the following samples can be considered:
The grandparent DNA test is performed when it is not possible to test the Alleged Father. Best results are obtained if samples of the 2 grandparents of the alleged father, the child and mother are tested. The grandparent DNA test is a 46-marker test that requires no extra family members.
If it is impossible to get samples from the alleged father, samples may be collected from either the paternal uncle or aunt of the child since they share 25% of their genes with the child. This is a 46-marker test hence no additional family members are required but samples from the mother may strengthen results.
If it is impossible to get the alleged father's samples, samples from any surviving male relative related to the alleged father may be collected for a Y-chromosome test. This test finds out whether males have a common male relative and traces the male lineage. This test is only for males.
The sibling DNA test involves comparing a child with his/her sibling. It can be carried out if it is impossible to test the alleged father. Two siblings don't always share DNA types in common when considering each marker tested. Each sibling should share half of their DNA in common.
DNA Results will be available for collection within 2 weeks after receiving all your samples.
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