Gce Model Questions Vol1 2019 Biology Question 29

Practice objective / multiple choice question 29 from the 2019 Gce Model Questions Vol1 Biology examination.

Gce Model Questions Vol1 2019 Biology Objective / Multiple Choice Medium Difficulty
Question 29 GCE_MODEL_QUESTIONS_VOL1 • 2019 • BIOLOGY • objective

In pea plants, the genes for plant height (A = tall, a = dwarf) and flower colour (B = purple, b = white) are linked on the same chromosome with a recombination frequency of 10 %. A plant heterozygous for both traits (genotype AaBb) is in the coupling phase (AB/ab). The plant is self‑fertilised. What are the expected phenotypic percentages of the offspring in the following classes: tall‑purple, tall‑white, dwarf‑purple, dwarf‑white?

Answer Options

Correct Answer A. Tall‑purple ≈ 70.3 %; Tall‑white ≈ 4.8 %; Dwarf‑purple ≈ 4.8 %; Dwarf‑white ≈ 20.3 %.
B. Tall‑purple ≈ 64 %; Tall‑white ≈ 6 %; Dwarf‑purple ≈ 6 %; Dwarf‑white ≈ 24 %.
C. Tall‑purple ≈ 80 %; Tall‑white ≈ 5 %; Dwarf‑purple ≈ 5 %; Dwarf‑white ≈ 10 %.
D. Tall‑purple ≈ 55 %; Tall‑white ≈ 15 %; Dwarf‑purple ≈ 15 %; Dwarf‑white ≈ 15 %.
Correct Answer
A
Correct Option:
Tall‑purple ≈ 70.3 %; Tall‑white ≈ 4.8 %; Dwarf‑purple ≈ 4.8 %; Dwarf‑white ≈ 20.3 %.

About This Question

This is Gce Model Questions Vol1 2019 Biology Question 29. It is one of the objective questions from the 2019 Gce Model Questions Vol1 Biology examination.

Difficulty level: Medium .

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