Assuming an average, fully developed adult man, what sort of changes could be made to his genome that would have a noticeable effect on his mind or body? To the best of our current scientific knowledge, that is. I know we don't know what a lot of genes are for.
To be specific, I want to know if you could change the physicality of a person, as in, their strength, stamina, and metabolism, and wether or not you can change a person's personality, most importantly their focus, or at least their urges.
Other information that I know:
- Most genes responsible for features are only relevant during the development of those features, and changing them post-development would have no effect of the person who had the change. For example, changing genes for bone structure would have no effect on somebody with developed bones. Their children might show a change, though.
- Editing the genome of an adult is difficult due to the number of cells that have to be edited. Assume this has been taken care of.
BONUS POINTS (You don't have to) IF
- You can link to a research paper describing a gene and its effect on an adult.
Also, does this question qualify for the hard-science tag?