title: Slightly deleterious mutant substitutions in evolution.
mesh_terms: D000483:Alleles; D005075:Biological Evolution; D005787:Gene Frequency; D005799:Genes, Dominant; D005808:Genes, Recessive; D006720:Homozygote; D008954:Models, Biological; D009154:Mutation; D011110:Polymorphism, Genetic