Q1. In a population genetics study, an insect population initially has a pesticide resistance allele frequency of 0.1. After 10 generations under pesticide pressure, the frequency rises to 0.7. Assuming random mating and no migration, which evolutionary force best explains this change and why?

• ○Natural selection favoring the resistance allele increases its frequency rapidly.
• ○Genetic drift randomly increased the resistance allele frequency.
• ○Gene flow introduced more resistance alleles from other populations.
• ○Mutation rate increased, producing many new resistance alleles.