An experimental population is started with a recessive deleterious allele (m) at a high frequency (p). The wild type homozygote (+/+) and heterozygote (+/m) have equal fitnesses and the remaining homozygote (m/m) has a relative fitness of l-s. Assuming random mating with respect to the gene locus and that the generations are separate, show that the frequency of m after one generation will be equal to:

p(1-ps)/(1-p2s).