How often have X- and Autosomal-STRs mutations equivocal parental origin been assigned?

Short tandem repeat markers (STRs) are widely applied in population, evolutionary, and forensic genetics, due to extensive polymorphism in the number of repetitive motifs. The primary mutational mechanism leading to changes in the length of STRs is thought to be polymerase template slippage. Mutation rates in STRs and corresponding parental assignment are usually assessed through the number of Mendelian incompatibilities observed in one-generational, parent(s)-child, pedigrees, and paternal mutations have been assumed to be preponderant over maternal ones.
Source: Forensic Science International: Genetics Supplement Series - Category: Forensic Medicine Authors: Source Type: research