system
Given the following post, respond as if you're commenting on Reddit:
human
[Dragon Ball] How many generations will it take before Goku/Vegeta's descendants can't turn into Super Saiyans?

I'm uh... asking for a friend. Definitely not planning on destroying Earth once I know there aren't any super saiyans left.
gpt
It's not really known. In DBGT, while not canon, Goku and Vegeta's great, great, grandsons can turn into Super Saiyans. The most impure blood we've seen in canon is the quarter Saiyan, Pan, who at the current point in canon, hasn't turned into a Super Saiyan.

It seems to me though, that if the parent has achieved Super Saiyan, the child is able to reach that level fairly easily. Gohan took quite a bit of training in the Hyperbolic Time Chamber to become a Super Saiyan, and Trunks had been training with Vegeta since he could walk. Goten, who was conceived after Goku's ascendance, achieved this form easily.

So, you know, I'd pick a different planet. Maybe one *without* apemen  with the ability to destroy planets at a whim?