Conclusion:
In some ways the lack of shared genetic patterns among species is not
surprising, as evolution is a balance of several forces that leave a
complex mosaic of patterns in the genome. Finding any common patterns
among species would require very strong evolutionary forces to
consistently shift this balance in the same way for every species. When
comparing genome scans divergence in such patterns may be the norm and
conservation may be a comparatively rare exception. Our results
demonstrate that genome scans can be noisy, due to the effects of
demographic shifts, genomic architecture or selective sweeps. Yet these
noisy results help in the development of a general theory on how
evolutionary forces shape the genome, by showing when similarities do
not arise and some of the oddities that one may see when performing a
genome scan.