title: Mutation and evolution at the molecular level.
mesh_terms: D000483:Alleles; D005075:Biological Evolution; D004586:Electrophoresis; D006454:Hemoglobins; D006579:Heterozygote; D006801:Humans; D008968:Molecular Conformation; D009154:Mutation; D012641:Selection, Genetic; D013997:Time Factors
chemical_list: D006454:Hemoglobins