Circular genome map. Map showing shared genetic material between humans (outer ring) and (from inner ring outwards) chimpanzee, mouse, rat, dog, chicken and zebrafish chromosomes. Each ring is based on the idiogram of one chromosome. The colours within each ring form a heat map, the pattern of which represents hot spots of shared genetic material, or synteny. A highly fragmented pattern indicates greater evolutionary divergence from humans. The numbers on the human chromosome represent scale bars and the grey intersecting lines are paths indicating chromosome loci. This map was created using Circos, software which visualises complex genetic comparisons between different species or within the same species.