The parentage analysis is based on multiplex PCR of Short Tandem Repeats (STR) at specific loci of DNA. A paternity index (PI) is calculated for each STR marker thus the product of the individual Pls is the combined Paternity Index (CPI) is finally used to calculate the probability of parentage. This 27-STR-marker parentage analysis fulfills the requirements from both USCIS (CODIS markers) and the new European Standard Set (ESS). And reaches the average exclusion chance much lower than required.
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