In horses, coat color is controlled by several genes. Gene B determines color, with B encoding for black hair and b encoding for
chestnut hair. Gene W determines whether color is deposited in the hair, with W preventing color deposit (white). This is an
example of epistasis and a horse with the genotype WwBb would be .
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a dominant; black
b recessive; white
c dominant; white
d recessive; chestnut