Question

The diagram below illustrates the change that occurred in the frequency of phenotypes in an insect population over 10 generations. A probable explanation for this change would be that over time there was…….

• A. a decrease in the adaptive value of gene a
• B. an increase in the adaptive value of gene a
• C. an increase in the population of this insect
• D. a decrease in the mutation rate of gene A

Answer 1

The correct option is B

an increase in the adaptive value of gene a

Population genetics shows us that certain traits of a species will become more abundant if they benefit the species. In this case, having spots must camouflage the insect, therefore the gene responsible for the spotting, a, will increase over time in the population.