But you are right insofar as the vast majority of mutations are injurious, Furthermore, many are neutral and a small proportion mildly beneficial. Strongly beneficial mutations are very rare indeed.
Natural selection will ensure fatal or injurious mutations are removed from the gene pool. It will also allow beneficial mutations to spread to future generations.
Just imagine the affect on species after 3 billion years of this constant filtering of mutations by natural selection.
beneficial mutations would accumulate over time - why wouldn't they? Therefore species are likely to change in response to new or changing environments.
Message Thread | This response ↓
« Back to index