Answer:
Genetic drift
Step-by-step explanation:
- Genetic drift is the mechanism that results in a change in the distribution of alleles within an isolated group of organisms.
- In this case, a group of yellow violet plants became isolated from a large violet plant population causing a change in allele distribution.
- This is a result of genetic drift which is a random process that may cause allele frequency change over a short period.
- The process may, therefore, result in the loss of genetic variation due to the alteration of allele frequency in a population.