Why is there more than one single locus used in actual paternity DNA test?

Multiple loci are used in paternity DNA tests to increase accuracy and reliability. Each locus contains specific genetic markers that vary among individuals, providing a more comprehensive profile. Analyzing several loci reduces the chances of false positives or negatives by ensuring that the genetic similarities or differences are statistically significant. This multi-locus approach enhances the test's ability to conclusively establish paternity or exclude unrelated individuals.