This link is a good one for predicting the colors of chicks based on the color of the parents. Sometimes crossings can produce sex linked chicks where you least expect. I had my columbian orpington rooster over my buff Orpington hen and according to this link , yellow or golden chicks would be males, silver chicks would be females. Cool,isn't it?
http://kippenjungle.nl
http://kippenjungle.nl