Fig. 2

a Illustrative scheme demonstrating the quantification of the repetitive regions - STR. STR analysis is performed initially by a PCR reaction that amplifies the region where the replications occur. Then the Sequencing is applied, which indicates the number of repetitions that the marker presents. The X-marker presents three and five replicates of each parent allele, while the other Y-marker presents the same number of replicates in the two alleles. b In the electropherogram, it is possible to see the peaks of two markers indicating the number of repetitions presented by a sample