Originally Posted by
cuppajoe_9
Fossilization is rare. There have been rarely few creatures with harmful mutations because these creatures, by definition, die before being able to pass on their genes. Beneficial mutations are easier to find because these things spread through the gene pool.
But there should be at least as many poorly mutated creatures as pathways of well mutated creatures.
Nope, it requires more non-beneficial mutations than beneficial. However, it predicts that creatures displaying beneficial mutations will be more common, because they – again, by definition – are better at replicating themselves.