This is the same as junk DNA. It is best to have regressive DNA. That way you can lurk. Being dominant, you'll get wiped out in some era when you're not optimal.
This is related th why having two sexes is useful, perhaps, to keep dispersion of genotypes into a population and thus make it more robust to environmental changes.
But junk DNA and recessives have no defense against mutation. If one of them is mutated, the mutation can survive just as well. A dominant, on the other hand, which is mutated will probably mutate to a harmful form and will immeidately die out, with no chance of taking over by genetic drift.
To view the post on a separate page, click: at 11/05/2007 04:33:00 AM (the permalink).