Figure 8: (G+C) content and density of CpG islands shows more variability in human (red) than mouse (blue) chromosomes.
From: Initial sequencing and comparative analysis of the mouse genome

a, The (G+C) content for each of the mouse chromosomes is relatively similar, whereas human chromosomes show more variation; chromosomes 16, 17, 19 and 22 have higher (G+C) content, and chromosome 13 lower (G+C) content. b, Similarly, the density of CpG islands is relatively homogenous for all mouse chromosomes and more variable in human, with the same exceptions. Note that the mouse and human chromosomes are matched by chromosome number, not by regions of conserved synteny.