When traveling to an alternate Earth, how many generations would you have to breed with the natives to prevent inbreeding?
A group of 35 superhumans from the future get trapped on the alternative Earth still in the Dark Ages. Banding together they take control of a small country and establish themselves up as kings and nobles. They seek to preserve their superhuman traits, but at the same time they want to prevent inbreeding. Every generation that they interbreed with the natives, their children will be less powerful. How many generations would the group have to breed with the natives until they can begin to breed among themselves again?
Assume that someone with one full super power parent will be half as powerful has one with two full super-powered parents. And if the one with only one full super-powered parent breeds with another non super-powered native the offspring will be again half as powerful as there one super-powered parent.
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