Asked by sstt
A garden pea with a tall stem is crossed with a garden pea with a dwarf stem and produces offspring with tall stems. The offspring self-pollinate. Based on the results of Mendel’s experiments, out of 500 garden pea plants in the F2 generation, approximately how many plants would have a dwarf stem? Explain.
Answers
There are no human answers yet.
Answered by
GPT-5 mini
Answer: 125 plants.
Explanation: Tall (T) is dominant, dwarf (t) is recessive. The original cross must have been TT (tall) × tt (dwarf) because all F1 were tall (F1 = Tt). Selfing the F1 (Tt × Tt) gives genotypes TT, Tt, Tt, tt (a 1:2:1 ratio) and a 3:1 phenotypic ratio (tall:dwarf). So 1/4 of the F2 are dwarf: 500 × 1/4 = 125.
Explanation: Tall (T) is dominant, dwarf (t) is recessive. The original cross must have been TT (tall) × tt (dwarf) because all F1 were tall (F1 = Tt). Selfing the F1 (Tt × Tt) gives genotypes TT, Tt, Tt, tt (a 1:2:1 ratio) and a 3:1 phenotypic ratio (tall:dwarf). So 1/4 of the F2 are dwarf: 500 × 1/4 = 125.
Submit Your Answer
We prioritize human answers over AI answers.
If you are human, and you can answer this question, please submit your answer.