The colour and type of the Chocolate Gold Laced Orpingtons has improved greatly over the last two breeding seasons and the 2015 pullets are of an exceptional quality.
My original Chocolate Gold Laced Orpington breeding group showing a darker Chocolate base colour and the gold being much lighter, almost Buff
The Gold has developed into an even bright shade consistent throughout the plumage with a regular even Chocolate lacing.
The lacing in orpingtons is made up of a combination of three genes.The pattern gene ( Pg ), the Columbian gene ( Co ) and a black melanised gene ( MI )
The pattern gene is responsible for creating the lacing by moving the black pigment in the feather into a ring around the feather shaft while the Columbian gene you would describe as a clarity gene, it helps to restrict the black pigment from the areas you want to clear which in this case is the centre of the feather. MI intensifies the black in the outer lace which gives the feather enough black pigment to make a solid lace around the feather.
THE CHOCOLATE IN THE CHOCOLATE GOLD LACED IS A SEX LINKED RECESSIVE GENE
So a cockerel needs two copies of the gene to be chocolate but the hen only needs one.
Chocolate x Chocolate = 100% Chocolate
Black split Chocolate cockeral x Black hen = 25% Black split cockerals/ 25% Black cockerals/ 25% Black hens/ 25% Chocolate hens
Chocolate cockeral x Black hen = 50% Black split cockerals / 50% Chocolate hens
Black cockeral x Chocolate hen = 50% Black split cockerals/ 50% Black hens
Black split Chocolate cockeral x Chocolate hen =25% Black split Chocolate cockerals/ 25% Chocolate cockerals/ 25% Black hens/ 25% Chocolate hens