Ch. 9 discussed nilsson-ehle's 1908 analysis of the genetics of kernel color in wheat. nilsson-ehle found that alleles at three loci (a/a, b/b, c/c) had additive genetic effects on the phenotype, with capital-letter alleles conferring red color and lower-case alleles conferring white color. suppose that genotype "aabbcc" has white kernels (call this color phenotype "0"), and that each capital-letter allele found within a genotype adds the same 1 unit of red color to the kernels. which of the possible phenotypes must have allele "b"?