NOTE 18O: We can see the answer to iii) using a simple mutation load argument: Every mutation that comes into the population must eventually be eliminated by a selective death. In every generation, 2Nμ mutations enter. If the selective deaths are of homozygotes, then each death removes two alleles, and we have 2 Nμ = 2NL, where L is the fraction that die because they carry the deleterious allele. See p. 552.