Genes R and Y follow independent assortment. If RRYY produce round yellow seeds and rryy produce wrinkled green seeds, what will be the phenotypic ratio of the F2 generation?

1. A. Phenotypic ratio - 9 : 7
2. B. Phenotypic ratio - 1 : 2 : 1
3. C. Phenotypic ratio - 3 : 1
4. D. Phenotypic ratio - 9 : 3 : 3 : 1

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