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3-3 Using the forked-line, or branch diagram, method, determine the genotypic and phenotypic ratios of these trihybrid crosses: (a) AaBbCc AaBBCC, (b) AaBBCcaaBBC, and (c) AaBbCcAaBbCc. HINT: This problem asks you to use the forked-line method to quickly determine genetic outcomes. The key to its solution is to consider each gene pair separately. First prediat the outcome of the A/a genes and write these down. Then, for each of those outcomes, write predictions for the B/b genes. Finally, for each of those outcomes, write predictions for the C/C genes. At that point, you will be ready to determine the proportionate ratios of all the different possible combinations