In wheat plants kernel color is determined by three different genes each with two alleles. The more dominant alleles present,the darker the kernel color. If a plant with the genotype AaBbCc is crossed with another plant with the same genotype, what is the expected ratio of the darkest to lightest kernels? A) 1:64 B) 1:16 C) 1:4 D) 1:1

To determine the expected ratio of the darkest to lightest kernels when a plant with the genotype AaBbCc is crossed with another plant with the same genotype, we need to consider the inheritance of each gene separately and then combine the probabilities.Each gene has two alleles, and the more dominant alleles present, the darker the kernel color. Let's analyze each gene:1. Gene A: Aa - Possible combinations: AA, Aa, Aa, aa - Probability of having at least one dominant allele (A): 3/4 - Probability of having no dominant alleles (aa): 1/42. Gene B: Bb - Possible combinations: BB, Bb, Bb, bb - Probability of having at least one dominant allele (B): 3/4 - Probability of having no dominant alleles (bb): 1/43. Gene C: Cc - Possible combinations: CC, Cc, Cc, cc - Probability of having at least one dominant allele (C): 3/4 - Probability of having no dominant alleles (cc): 1/4Now, let's calculate the probability of having the darkest kernel color, which means having at least one dominant allele from each gene:Probability of having the darkest kernel color = Probability of having at least one dominant allele from gene A * Probability of having at least one dominant allele from gene B * Probability of having at least one dominant allele from gene CProbability of having the darkest kernel color = (3/4) * (3/4) * (3/4) = 27/64The probability of having the lightest kernel color, which means having no dominant alleles from each gene, is:Probability of having the lightest kernel color = Probability of having no dominant alleles from gene A * Probability of having no dominant alleles from gene B * Probability of having no dominant alleles from gene CProbability of having the lightest kernel color = (1/4) * (1/4) * (1/4) = 1/64Therefore, the expected ratio of the darkest to lightest kernels is 27:1, which is closest to option B) .