A small isolated population consists of 8 diploid individuals. The allele A has an initial frequency of 0.3. Assuming neutral evolution (no selection, mutation, or migration), what is the probability that allele A will eventually become fixed in the population?
Answer
0.30
The correct answer is 0.30 — Hence the probability that allele A becomes fixed is , i.e., 30%.
Step-by-step solution
- Under neutral drift, the probability of eventual fixation of an allele equals its initial frequency.
- Hence the probability that allele A becomes fixed is , i.e., 30%.
Common mistake: Confusing fixation probability with chance of fixation after a fixed number of generations
Concept tested: Probability of fixation under genetic drift
Published · How this solution was prepared and checked
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