Three independently segregating genes (A, B, C), each with two alleles, determine height in a plant. Each capital-letter allele adds 2 cm to a base height of 2 cm. a. What are the heights expected in the progeny of a cross between homozygous strains AA BB CC aa bb cc? b. What is the distribution of heights (frequency and phenotype) expected in an cross? c. What proportion of plants will have heights equal to the heights of the original two parental strains? d. What proportion of the will breed true for height?