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In both cattle and in pigs black hair color is completely dominant to red hair color. Consider the following mating scenarios:

A black bull was bred to eight black cows, each of which were daughters of a known heterozygous bull. Eight black calves were produced as a result (each cow had one black calf).

A black boar was bred to a single black sow who was a daughter of a known heterozygous boar. A single litter of eight black pigs were produced. The sow had eight black pigs.

Which statement below provides the BEST interpretation of these results?

A

Both the bull and the boar are probably carriers of the red allele.

B

The bull has been more thoroughly tested of being a carrier of the red allele than the boar.

C

The boar has been more thoroughly tested of being a carrier of the red allele than the bull.

D

Both the bull and the boar have been equally tested because they both sired eight dominant progeny.

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