I had one male parent all the children inhereted buildings skills, as when I got back to my game in the evening the food almost gone as the next genaration were all builders, so the next time I made sure it was a master farmer that I put to parenting, so my next genaration all farmers. Then a few days later the food was down again and I had another genaration of builders, so then I had to put all builders on farming. Now the food is up and now my next genaration is a mixer of farmers and builders.