I filled in each labeled square for you and wrote each percentage to the right of each square with the genotype of the last two.
The cause of the change in insect characteristics occurred when a few survivors of the 1st spray became resistant to the insecticide. When they had offspring, those insect babies are born with the trait that made them resistant to insecticide. This occurs when the parents pass on the trait to their offspring. The end result is that the insecticide is less effective and more insects survive.
C extinction because they need diversity to reproduce
