Question :  In a large random mating population, there are initially 91 percent dominants for a monogenic trait.

a. If there would be 20% selection against the dominants, what would be the expected 
frequency of the three genotypes in the next generation? 


b. If selection would be against the recessives at an intensity of 0.10, what would be the 
frequency of the recessives after one generation? What would be the change in the 
frequency of the recessive allele? 


c. If selection against the recessives would be complete every generation, how many 
generations would be needed to reduce the frequency of the recessive gene to 5%? 


d. If the population would be selfed before completely discarding the recessives, what 
would be the frequency of the recessives after one generation of selection?