title: Sex frees viruses from genetic 'ratchet'.
authors.forename: V
authors.initials: V
authors.lastname: Morell
mesh_terms: D017126:Bacteriophage phi 6 / Q000235:genetics* / Q000502:physiology; D005075:Biological Evolution; D016679:Genome, Viral; D009154:Mutation; D011995:Recombination, Genetic