If a B is a dominant allele that codes for a trait where the bearer of this allele has a black coat, and b is a recessive allele where the bearer has a brown coat, the recessive genotype will exhibit the phenotype of brown coat, the genotyp will have the black coat phenotype, and the dominant genotype will have the black coat phenotype. (Use either heterozygous or homozygous in the blanks.)
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