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Table 3 Expected probability for sharing one/two allele(s) between two unrelated individuals for the Powerplex 16 kit in the state of Mexico database (N = 2000)

From: Analysis of fortuitous matches in a STR genotype database from Mexico and its forensic efficiency parameters

STR loci

p (matching)

TH01

0.71892

PENTA E

0.32048

D21S11

0.53897

D18S51

0.41570

FGA

0.41145

PENTA D

0.53029

D8S1179

0.60275

CSF1PO

0.70407

D7S820

0.62973

D16S539

0.64500

D13S317

0.52484

D5S818

0.73017

VWA

0.68664

TPOX

0.77201

D3S1358

0.77629

Total probability

(Expected)

0.00030617 / 2000b = 1.153081 × 1017

(1 in 6,532,422 random comparisons)

Probability

(Observed)

0.000004977

(9 in 2001,000a)

  1. aAll possible pairwise comparisons among DNA profiles in our database (N = 2000)
  2. bBonfferroni correction according to the sample size