The chestnut coat color of horses is due to a recessive allele, while black coat color is due to a dominant allele. The pacing gait, a type of running, is due to a recessive allele, while the trotting gait is due to a dominant allele. Show the genotypes and phenotypes of the offspring to be expected from crossing a black trotter, heterozygous for both genes with a chestnut pacer.