Note, that there is no explicit “gender” in the game at all (the game wont ever ask you “do you want to be male or female”), its just that some of the “body shapes” which you can pick and choose from and mix with different faces and head pieces may have a name that implies it being more feminine, but nothing stopping you having a very “effeminate” body piece with a very “masculine” face and “alien” head piece, and to then make your entire body be a lovely toxic green colour.