mutation hybridization genetic drift trait acquisition
I gave my students this multiple choice question: A large plant population may impose selective pressure on a smaller, isolated group of plants, resulting in a change in allele distribution. Which mechanism is responsible for this change in the allele distribution?

Only one answer is correct among these 4 choices:
- mutation
- hybridization
- genetic drift
- trait acquisition

Could you tell me which one is correct?

genetic drift