After playing VV games for a couple years, I just found this thread too. I find it fascinating from a math/genetics stand, yet also somewhat disturbing from a "master race" viewpoint. I know they're only pixels, but just the idea of breeding for blondes (or whatever) is unnerving. (Maybe I shouldn't say anything, I've been known more than once to knock off an annoying villager with poisionous stew and have also tried to unsuccessfully to breed for runners.)

By the way, in order to up your odds for the preferred traits, have you tried simply deleting a game you just started if you didn't like who you got to start your tribe? If you keep trying new tribes enough, I would think you would increase your chances of getting the "good" genes for your breeding program.