Answer:
A cross between a true-breeding, white-feathered Andalusian hen and a true-breeding, black-feathered Andalusian rooster results in 100% blue-feathered Andalusian offspring.
Explanation:
the difference between incomplete dominance and codominance: ... In some chickens, the gene for feather color is controlled by codominance. The allele for black is B and the allele for white is W. The heterozygous phenotype is known as ... 50% of the offspring have genotype BW, 25% are BB, and 25% are WW.
