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In Mendel's monohybrid cross of tall × dwarf pea plants, the phenotypic ratio in the F₂ generation was
A1 tall : 1 dwarf
Ball tall, no dwarf
C9 tall : 7 dwarf
D3 tall : 1 dwarf
Answer & Solution
Correct answer: D. 3 tall : 1 dwarf
F₁ (all Tt) self-pollinated gives F₂ with genotypes 1 TT : 2 Tt : 1 tt. Since Tt looks just like TT, the visible (phenotype) ratio is 3 tall : 1 dwarf.
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