Question

question 2 of 15
which of the following must be true if a population is undergoing evolution? select the two answers that are correct.
□ the most advantageous of the alleles are increasing in frequency.
□ the gene pool is changing over the course of generations.
□ genetic drift is causing random changes in the gene pool.
□ the allele frequency of the population is changing over time.
□ a high mutation rate is increasing genetic variability in the population.

Explanation:

Evolution is defined as a change in the genetic composition (gene pool) of a population over time. This can be measured by changes in allele frequencies. While advantageous alleles may increase in frequency (due to natural selection), it's not a requirement for evolution (e.g., genetic drift can cause evolution without advantageous alleles increasing). Genetic drift is one mechanism of evolution (but not the only one - natural selection, mutation, migration are others). A high mutation rate is not a requirement for evolution (even low - mutation populations can evolve through other mechanisms like genetic drift or natural selection).

Answer:

• The gene pool is changing over the course of generations.
• The allele frequency of the population is changing over time.