Figure 6From: An evaluation of LSU rDNA D1-D2 sequences for their use in species identificationThe assessment of hybrid status from heterozygosity of informative characters. The sequence traces were obtained from four F1 hybrid animals between Cottus perifretum and C. rhenanus. Four positions where fixed differences were known to occur are selected. Double peaks are evident in most, although not in all cases (see text).Back to article page