Dihybrid cross with one gene showing incomplete dominance

2023 Manipur 1 question

1. 1 Principles of Inheritance and Variation Medium
   A certain plant homozygous for yellow seeds and red flowers was crossed with a plant homozygous for green seeds and white flowers. The $F_1$ plants had yellow seeds and pink flowers. The $F_1$ plants were selfed to get $F_2$ progeny. Assuming independent assortment of the two characters, how many phenotypic categories are expected for these characters in the $F_2$ generation?
   A 9 B 16 C 4 D 6
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