Biologymedium · Past Paper
The 1:2:1 phenotypic ratio is characteristic of which pattern of inheritance in the F2 generation?
AComplete dominance
BIncomplete dominance
CIndependent assortment
DSex-linked inheritance
✓ Correct Answer: B — Incomplete dominance
In incomplete dominance, the F2 phenotypic and genotypic ratios are both 1:2:1 (e.g., 1 red, 2 pink, 1 white).
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