In this dog breed, the allele for a spotted coat (b) is recessive, meaning that an individual must have two copies of the recessive allele to express the spotted phenotype. Therefore, the genotypes that would lead to a spotted phenotype are:
- bb: homozygous recessive (having two recessive alleles).
Dogs with this genotype will exhibit the spotted coat phenotype.
Dogs with the following genotype will not have a spotted coat, as they will possess at least one dominant allele (B):
- BB: homozygous dominant (having two dominant alleles).
- Bb: heterozygous (having one dominant allele and one recessive allele).
In summary, the only genotype that results in the spotted phenotype is bb.