allery4 O'clock plant flower color shows incomplete dominance: RR (red) × rr (white) → Rr (pink). F2 phenotypic ratio (Rr × Rr):
A1:2:1 (red : pink : white)
B3:1
C9:3:3:1
DNo phenotype
Answer & Solution
Correct answer: A. 1:2:1 (red : pink : white)
**Incomplete dominance:** F2 ratio matches genotypic ratio because heterozygote distinguishable.
Rr × Rr → 1 RR (red) : 2 Rr (pink) : 1 rr (white).
Phenotypic = genotypic = 1:2:1.
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