As the human population grows and countries continue to develop, the demand for large fish has been steadily increasing. Unfortu
nately, the average size of the cod has decreased because the fishing nets were designed to catch the large fish and the smaller individuals could escape more easily. What is most likely happening to the genetic variation of the population of North East Arctic Cod? a. The genetic variation in the population is increasing due to selective pressure. b. The genetic variation in the population is decreasing due to selective pressure. c. The genetic variation in the population is increasing due to gene flow. d. The genetic variation in the population is decreasing due to gene flow.
The example given in the question is an example of gene flow which can be described as the movement of specific genes from the the gene pool population to population.
The act of catching the bigger fish and letting the smaller ones escape is changing the gene pool of the North East Arctic Cod and causing the next generations to have smaller and smaller sizes which is given as the genetic variation decrease due to gene flow.
