In corn plants, a dominant allele (I) inhibits kernel color, while the recessive allele (i) permits color when homozygous. At a different locus, the dominant gene P causes purple kernel color, while the homozygous recessive genotype pp causes red kernels. If plants that are heterozygous at both loci are crossed, what will be the phenotypic ratio of the F1 generation? Responses 15:1 15:1 - no response given 9:3:3:1 9:3:3:1 - no response given 13:3 13:3 - no response given 12:3:1 12:3:1 - no response given