Most chickens do not have feathers on their legs. This phenotype is the result of two genes interacting and having only recessive alleles for both genes. The presence of a dominant allele for either gene or for both genes causes feathers. What is the unfeathered leg : feathered leg ratio in the offspring of chickens that are heterozygous for both genes? A. B. C. D. 9:7 12:4 13:3 15:1

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