Why would scientists mutate genes on purpose

they do it for the advantages

Explanation:

mutation decreases the fitness of the organism. A beneficial, or advantageous mutation increases the fitness of the organism. ... In the neutral theory of molecular evolution, neutral mutations provide genetic drift as the basis for most variation at the molecular level.

the most common type of reef is the fringing reef. this type of reef grows seaward directly from the shore. they form borders along the shoreline and surrounding islands.