Answer;
A 5 percent increase in the reproductive success of some genotypes, but a 5 percent decrease in the reproductive success of other genotypes.
Explanation.
Genotypes with increaed reproductive success will have larger gene pool than other with 5% reduction.Thefore higher frequency of survival.Besides the high reproductive success ensure genetic variation which leads to changes in genome .
Full Question.
Which of the following would most likely lead to a change in the genetic structure of a population?
a. An increase of 1.1-fold in the reproductive success of all genotypes
b. A decrease of 20 percent in the reproductive success of all genotypes
c. A 5 percent increase in the reproductive success of some genotypes, but a 5 percent decrease in the reproductive success of other genotypes
d. Both a and b will likely change the genetic structure of the population more than c will.
e. None of the above is likely to change the genetic structure