The picture below represents actual results from an STR (Short Tandem Repeat) test. The profile at each STR region (e.g. D3S1358, THO1 etc) appears as one or two peaks. The height of each peak represents the number of times that the STR is repeated in that person. For example, at the D3S1358 locus, the STR is repeated 14 times on one of the pairs of chromosomes at that site, and it is repeated 17 times on the other pair of the chromosome. The STR profile for this individual at the D2S1358 site would be listed as 14, 17. A similar STR profile is generated for each person involved in a DNA parentage or identity test.