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Genetic Engineering: How would you change your DNA?

by Felix Karg1 min read14th Jan 20216 comments


World Optimization

Recently, genetic engineering and related disciplines gained fame through capacities granted by gene therapy. It appears that it should be possible to fully and freely modify our own genome at some point, maybe even within the next ten years. So I was wondering — if we could change our genome, what would we want to change?


Question: If we had the ability to perfectly genetically engineer ourselves, with no chance of failure:

  • What would you change?
  • Why would you change it? (if not apparent)
  • What would you never change?
  • What do you think others will do?

Please refrain from discussions about ethics. Broad answers suffice.

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Fully changing the human genome is very unlikely. The human body has 100 of different cell types and 100s of billions of cells. It's very unlikely that you will be able to do DNA changes in a grown human in all cells. 

I don't think the question is really well formed. An ability to change my DNA sequence (with or without any of the accompanying epigenetic stuff) doesn't imply any ability to predict the effect. Somebody already pointed out that an awful lot of stuff has to be done at specific points in development. I'd like to add that we have zero idea what 95 percent of the genome is doing, and probably no complete idea of what any of it is doing.

In principal, you could come up with alterations that would cause you to "regrow" into any new form you wanted. In practice, you might have to be a god to figure out what changes to make.

If I were given the ability to modify any part of any sequence at will, but stuck with the present state of knowledge of the actual effects, I'd go do a ton of research to see if there were any clearly known predispositions to disease that I could fix without too much risk of nasty side effects.

If I answer the question in the spirit of "how would you modify yourself given the ability to make any change you wanted", I'd start by giving myself the built-in ability to make further modifications at will, without outside equipment or help.

Then I'd start throwing in "superman" stuff at whatever rate my sense of identity seemed to be comfortable with. Probably starting with better resistance to disease and damage, and better healing. Then smarter-stronger-faster, better senses, etc. Lather, rinse, and repeat until thoroughly posthuman.

Taller, stronger, smarter? 

Remove negatives like lactose  or alcohol intolerance or susceptibility to disease.

Perhaps to see what people will choose; why not check out what they are selecting from sperm banks when they are allowed to make choices ?

3 comments, sorted by Highlighting new comments since Today at 8:46 AM

Lots of genes have their effect during early development; just because some trait is partly genetic doesn't mean you can affect it by altering the adult genome. I think it would be hard to say what you can and can't do by altering an adult genome (or at least I don't know).

Good catch, I didn't consider this possibility

If it were somehow possible, tuning down the SCN9A gene would be a pretty good start. If there exists a similar gene for pleasure, tuning that up would be cool too.