A monotonic increase in allele A across many generations is most consistent with
- A
Genetic drift only
- Bcheck_circle
Directional selection favoring A
- C
Disruptive selection
- D
Random mating with no selection
Explanation
A consistent rise in p across generations, especially asymptoting toward fixation, indicates directional selection favoring the A allele. Drift alone would produce a more erratic, non-monotonic trajectory.