"Ok , so there 's about 2 per person . But how does natural selection work against these ? Do n't they just build up over time , causing degeneration ?"
"Not if they are so bad that the person does n't live long enough to reproduce . Evolution is a very wasteful process and self-correcting to a certain extent . Plus , not all bad mutations are life threatening ."
"Ok , so there 's about 2 per person . But how does natural selection work against these ? Do n't they just build up over time , causing degeneration ?"
"Not if they are so bad that the person does n't live long enough to reproduce ."