Population size and natural selection in the land snail Cepaea nemoralis.
D000483:Alleles; D000818:Animals; D005075:Biological Evolution; D004592:Electrophoresis, Starch Gel; D005828:Genetics, Population; D005838:Genotype; D006823:Hybrid Vigor; D011110:Polymorphism, Genetic; D012641:Selection, Genetic; D012908:Snails / Q000201:enzymology / Q000502:physiology*; D014768:Virginia