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Navigating population-level coancestry in forensic mixture analysis.

Scientific reports - 6 Jan 2026

Costa Camila, Conde-Sousa Eduardo, Figueiredo Carolina, Costa Sandra, Ferreira Paulo Miguel, Amorim António, Prieto Lourdes, Pinto Nádia

Abstract excerpt

The genetic similarity of unrelated individuals of the same population can be measured through the coancestry coefficient, which quantifies the probability of a pair of alleles randomly chosen having a common ancestor. It is thus expected that the higher this coefficient, the lower the genetic variation between individuals of a population. This may weaken the evidence's weight in forensic genetics settings,...

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PMID: 41495218
DOI: 10.1038/s41598-025-33132-1
PMCID: PMC12855835

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