If I remember correctly....I have had blue legged pullets hatch from a willow legged male crossed to a white legged female. These offspring can carry the yellow legged gene and the males can also carry the blue legged gene from this cross.....These crosses were with Pyncheons. The females get the dark pigment (Blue-slate) from their fathers. The males have to have the blue-slate color from BOTH parents to show up....same goes for the willow color legs in males....BOTH parents have to have willow legs or blue carrying yellow to get willow colored legs. The females only need to get blue from their fathers and yellow from BOTH parents to have willow legs. I hope this helps....