Igcse Model Questions Vol1 2022 Biology Question 3
Practice objective / multiple choice question 3 from the 2022 Igcse Model Questions Vol1 Biology examination.
A beetle population initially has allele frequencies p = 0.6 and q = 0.4 (two alleles). The original effective population size is large, so the initial heterozygosity is H₀ = 2pq. A severe bottleneck reduces the effective size to Ne = 50 for five successive generations, after which the population expands again to a large size where drift is negligible. Assuming no mutation, migration or selection, calculate (a) the heterozygosity after the five‑generation bottleneck, and (b) the percentage loss of heterozygosity relative to the original value.
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This is Igcse Model Questions Vol1 2022 Biology Question 3. It is one of the objective questions from the 2022 Igcse Model Questions Vol1 Biology examination.
Difficulty level: Hard .
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