Canine Coat and Nose Color Testing

French Brittanies occur in several colors: black, brown, orange, and fawn, all with white. They can also be  and-tan and such dogs are usually called tricolor. Several genes and the interaction thereof contribute to these colors. All French Brittanies have white spotting. The modifier genes causing the amount of white patches is not known. One gene that is necessary for black or brown coat color is K, and the allele responsible is K^B. French Brittanies that are tricolor or fawn do not have a K^B, but are k^y/k^y. Dogs that are orange could be any genotype at the K locus since they are e/e and this masks the effects of K. Tricolor dogs must have an a^t/a^t genotype at the agouti locus. Fawn dogs have at least one a^y allele. Fawn testing is available at an extra charge of $_____.