I tried a little experiment... I chose one of my ''rare'' villagers, a male with short,straight yellow (or bright) blonde hair as a parent and mated him exclusively to all of the elegible women in the tribe...this produced lots of babies of course but NONE replicated him! I have played this game for quite some time and this particular villager type seldom pops up in the population. Every other type will eventually replicate itself and quite often I will see the ''same'' villager over and over...it's just curious to me why this one male villager in particular seems to crop up only rarely in my villages at least.