Fig. 3

Counts of distinguishable alleles in each (sub)species by STR locus, and per-locus increment due to sequence variants. The observed numbers of length variants among individuals are shown as grey bars, and the number of additional alleles resulting from sequence variation within and flanking the repeat array are shown in white and black respectively. STRs are organised into three groups as in Fig. 2, and shown below the figure. a Human [25] b Chimpanzee; c Bonobo; d Western lowland gorilla; e Eastern lowland gorilla; f) Mountain gorilla. Note that, although repeat array sequence variation is comparable across species, flanking sequence variation is not strictly comparable because the amount of sequence considered in different species varies somewhat