Answer:
most likely caused by natural selection in which mosquitoes resistant to DDT could survive and reproduce, while other mosquitoes could not.
Explanation:
It gets reflected or absorbed.
You receive 50% of your DNA from each of your parents, who received 50% of theirs from each of their parents, and so on. In the chart below you can see how the amount of DNA you receive from a particular ancestor decreases over generations. If you go back far enough, there is a chance that you inherited no DNA from a particular ancestor.