Ive been doing some reading for a friend on Cornish lacing genetics. As I understand it Dark Cornish are double laced, but Jubilees are red with the Columbia gene and the white lace Gene. My friend wants to produce silver laced Cornish like his Wyandottes and the way he proposed was crossing the Dark with Jubilee to get a Dark Cornish with the restrictor gene for single lacing, and the black lace gene. Then breeding those genes into a white Cornish. Would this work?