Igcse Model Questions Vol1 2019 Biology Question 17

Practice objective / multiple choice question 17 from the 2019 Igcse Model Questions Vol1 Biology examination.

Igcse Model Questions Vol1 2019 Biology Objective / Multiple Choice Medium Difficulty
Question 17 IGCSE_MODEL_QUESTIONS_VOL1 • 2019 • BIOLOGY • objective

Two genes, \(A\) and \(B\), are linked on the same chromosome with a recombination frequency of 12 %. A plant heterozygous for both genes (genotype \(AaBb\)) is in the coupling phase (chromosomes \(AB\) and \(ab\)). The plant is self‑fertilised.\ (a) What percentage of the offspring are expected to show a recombinant phenotype (i.e. \(Ab\) or \(aB\))?\ (b) If 200 seeds are obtained, how many of them are expected to display a recombinant phenotype? Give your answer to the nearest whole seed.

Answer Options

A. ≈10.0 % (about 20 of 200 seeds)
B. ≈12.0 % (about 24 of 200 seeds)
C. ≈13.5 % (about 27 of 200 seeds)
Correct Answer D. ≈11.3 % (about 23 of 200 seeds)
Correct Answer
D
Correct Option:
≈11.3 % (about 23 of 200 seeds)

About This Question

This is Igcse Model Questions Vol1 2019 Biology Question 17. It is one of the objective questions from the 2019 Igcse Model Questions Vol1 Biology examination.

Difficulty level: Medium .

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