Different types of mutations (represented by in a different way colored arrows) come about at various frequencies (represented by arrow thickness). range functions as being a sieve and allows just a subset of these https://tamzinmxsn996027.newbigblog.com/35817716/the-greatest-guide-to-44-of-the-world-s-population-has-at-least-the-first-of-5-gene-mutations-and-every-gene-mutation-works-against-you