A pure breeding tall pea plant was crossed to dwarf plant what will be the frequency of dwarf plants in F2?
Correct answer: A. 0.25
- A. 0.25
- B. 0.5
- C. 0
- D. 1
Explanation
Correct expected frequency of dwarf plants in the F₂ (from TT × tt → F₁ Tt; F₁ × F₁) = 0.25 (Option A).Option B (0.5) would be correct for a different cross (e.g., Tt × tt) or special cases.Option C (0) and D (1) are inconsistent with the stated pure-breeding tall × dwarf Mendelian cross unless additional, nonstandard biological conditions are specified.
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Mendel's laws explain segregation, independent assortment and the prediction of genetic ratios using alleles, genotypes and phenotypes. The chapter also covers linked genes, recombination and crossing over during meiosis, then applies pedigree reasoning to X-linked recessive traits, which show different inheritance patterns in males and females.
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