[bears]

By golden, I assumed you meant palomino, or a variant thereof. I have limited knowledge on genotypes, so I have done some research on it. Chimerics, from what I remember, is when the dna of two foals are combined on an off chance, so the horse carries both colors, but cannot have chimeric foals. I'm not sure how the chimeric would read on genotype.

phenotype: palomino chimeric
genotype: ee/aa/CRcr and EE/aa

also, assuming that the the black was white, this horse would carry an expression of Tobiano.
This is my first time ever doing something with genetics that includes this much, so of course i'm going to need to learn a lot.