Suppose that in a normal game, I want to develop a sub-race of Humans who can colonize low-gravity environments (Moons, etc). My people are usually limited to 0.3g worlds or higher. I research the first couple of -g Bio techs, enabling a -10% gravity tolerance modifier.
Now what? Can I now colonize worlds with 0.27g? Or do I need to build and operate Genetic Modifications centers? Where? Not on the destination world, presumably, because I can't COLONIZE it. On the source world for the colonists? How do I ensure that only modified colonists are embarked on my Colony Ships?
I'm confused...