217:624-616. 4. Fawns 113 (1967) The pmbability of survival of a new mutant in a actuating emininnient. Heredity 22: 438 443. S. Barron ND (1995) Linkage and the limits to natural selection. Genetics 140: 821 41. 6. Campos PR (2004) Fixation of beneficial mutations in the presence of epistatic inter