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Answer :
When crossing two pink four o'clock flowers (RW x RW), the F2 generation is expected to have a genotypic ratio of 1 RR: 2 RW: 1 WW, reflecting a 1:2:1 ratio of red:pink:white phenotypes due to incomplete dominance. The correct answer is option b.
When a red four o'clock flower with the genotype RR is crossed with a white four o'clock flower with the genotype WW, the resulting F1 offspring exhibit incomplete dominance and have pink flowers with the genotype RW. When two pink offspring are crossed (RW x RW), the expected genotypic ratio in the F2 generation can be predicted using a Punnett square, demonstrating a 1:2:1 ratio of red:pink:white.
The correct proportion of genotypes in the F2 generation would be 1 RR: 2 RW: 1 WW, which corresponds to answer option b. The phenotypic ratio will also be 1:2:1 for red:pink:white.
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