system
Given the following post, respond as if you're commenting on Reddit:
human
[Fallout] Are super mutants sexually dimorphic?
gpt
They are not. The way the FEV works on human bodies, both male and female, eliminates any secondary sex characteristics and most of the primary. The original project that eventually created super mutants was supposed to make super soldiers of the US army, so they all share the same "ultimate body plan" that ultimately results in hyper-developed muscles, enlarged skeleton, loss of hair, and green skin.

If you were to SOMEHOW pull down the pants of a super mutant, you'd probably find the tiny, shriveled remains of human genitalia and could tell which sex the original pre-mutated person used to be. Not unlike how it's super difficult to tell the sex of certain animals, like crocodiles or snakes, without plunging between their legs and doing a thorough check. But good luck doing that.