system
Given the following post, respond as if you're commenting on Reddit:
human
[Dragon Ball Z] Is there any reason that Goku and Turles look near-identical to one another?
gpt
Saiyans have a very low level of diversity in their gene pool. This is probably due to some previous even in the distant past where the species had a bit of a bottleneck after many individuals died out. Because of that most Saiyans look alike to some degree. Turles and Goku have a strong resemblance because of this.