Igcse Model Questions Vol1 2024 Biology Question 12

Practice objective / multiple choice question 12 from the 2024 Igcse Model Questions Vol1 Biology examination.

Igcse Model Questions Vol1 2024 Biology Objective / Multiple Choice Hard Difficulty
Question 12 IGCSE_MODEL_QUESTIONS_VOL1 • 2024 • BIOLOGY • objective

In a beetle population the allele \(A\) (dominant, green colour) and allele \(a\) (recessive, brown colour) have initial frequencies \(p = 0.6\) and \(q = 0.4\). The relative fitnesses of the three genotypes are: \(w(AA)=0.5\), \(w(Aa)=0.8\), \(w(aa)=1.0\).\n(i) Calculate the allele frequency of \(A\) after one generation of selection.\n(ii) Assuming random mating in the next generation, what proportion of the offspring are expected to be green (genotypes \(AA\) or \(Aa\))?

Answer Options

A. p' ≈ 0.60; about 70 % of offspring will be green
Correct Answer B. p' ≈ 0.514; about 76 % of offspring will be green
C. p' ≈ 0.48; about 82 % of offspring will be green
D. p' ≈ 0.55; about 68 % of offspring will be green
Correct Answer
B
Correct Option:
p' ≈ 0.514; about 76 % of offspring will be green

About This Question

This is Igcse Model Questions Vol1 2024 Biology Question 12. It is one of the objective questions from the 2024 Igcse Model Questions Vol1 Biology examination.

Difficulty level: Hard .

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