Suppose in a species of petunia, both locus a and locus b can independently determine petal color. at locus a, pink (a) is dominant over white (a). at locus b, pink (b) is also dominant over white (b). if there are dominant alleles at both loci, magenta petals are produced. if an aa bb plant is crossed to an aa bb plant, what is the ratio of magenta‑ to pink‑ to white‑flowered petunias expected in the f2 progeny?