$A$ tall true-breeding garden pea plant is crossed with a dwarf true-breeding garden pea plant. When the $F_1$ plants were selfed,the resulting genotypes were in the ratio of:
- A$3 : 1$ (Tall : Dwarf)
- B$3 : 1$ (Dwarf : Tall)
- C$1 : 2 : 1$ (Tall homozygous : Tall heterozygous : Dwarf)
- D$1 : 2 : 1$ (Tall heterozygous : Tall homozygous : Dwarf)
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