In dogs, the dominant allele of gene A causes a black color, the recessive allele a – brown. The dominant inhibitor gene

In dogs, the dominant allele of gene A causes a black color, the recessive allele a – brown. The dominant inhibitor gene I suppresses the manifestation of the action of both genes and determines the white suit. The recessive allele of the inhibitor gene i has no effect on coat coloration. What offspring can be expected from crossing a heterozygous black dog with a digheterozygous white?

From crossing a heterozygous black dog with a di-heterozygous white one can expect white, black and brown puppies in a ratio of 4: 3: 1.

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