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Paternity index (PI)

The likelihood ratio at a single STR locus comparing the probability of the child's allele given the alleged father is the biological father versus a random man from the population. Combined across loci to give the Combined Paternity Index (CPI).

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Related terms

Combined paternity index (CPI)Deficient paternity test Duo / motherless case Exclusion Familias Inbreeding coefficient (F)Inclusion Motherless paternity test Mutation rate NamUs Obligate paternal allele Presumption of legitimacy

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