Figure 6: Size ratio of mouse to human for orthologous 100-kb windows.
From: Initial sequencing and comparative analysis of the mouse genome
For each 100-kb region of the mouse genome, the size ratio to the related segment of the human genome was determined. The frequency of the various ratios is plotted on a logarithmic scale for both the autosomes (blue line) and the X chromosome (red line). The ratio for autosomes shows a mean of 0.91 but the ratio varies widely, with the mouse genome larger for 38% of the intervals. The X chromosome by contrast has a mean ratio of just over 1.0. Indeed, chromosome X is slightly smaller in human.
