Are you trying to understand the inheritance of choc?
A female either has Choc+ or choc. If she has choc, she will be chocolate coloured, and will pass the gene to her sons.
A male has either Choc+/Choc+, Choc+/choc or choc/choc. Those that are choc/choc are chocolate coloured, and will pass a copy of the gene to all offspring. Those that are Choc+/choc will not be chocolate coloured, but will pass the gene on to about half their offspring.
I guess you could consider gold to be incompletely recessive.
And not-barred is recessive. Looking at things backwards.