The following alleles exist in combs of chickens: Comb Shape Description Genotype Single Comb homozygous for both r and p rrpp Walnut comb both dominant alleles are present; R and P alleles are present R_P_ Pea comb the dominant allele P is present and the dominant allele R is absent rrP_ Rose comb the dominant allele R is present and the dominant allele P is absent R_pp Which of the following represents the correct phenotypes of the F2 offspring? Phenotype Single Walnut Pea Rose 3/16 9/16 1/16 3/16   b. Phenotype Single Walnut Pea Rose 1/16 9/16 3/16 3/16   c. Phenotype Single Walnut Pea Rose 3/16 1/16 9/16 3/16   d. Phenotype Single Walnut Pea Rose 9/16 3/16 3/16 1/16

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