The gene "B" is responsible for determining whether paws are black or white, while "b" is responsible for determining whether paws are black or white ,so Bb correct.
Phenotype (think pH. = physical) is the term used to describe how an animal (or any other form of life) appears. Genotype is the genetic makeup of an animal (generic = genetic). The phenotypic of a calf carrying at least one black (B) allele is black. A calf with two red (bb) alleles exhibits the phenotypic red.
The MC1R gene is typically found in two functional copies in most individuals, one from each parent. Due to the high levels of eumelanin, these people have dark brown or black hair.
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