Heredity 105 Genetics 97 HEREDITY 64 Genetics-- Heredity 44 Biology 26 heredity 22 Chromosomes 21 GENETICS : A Periodical Record Of Investigations Bearing On Heredity And Variation 19 GENETICS: A PERIODICAL RECORD OF INVESTIGATIONS BEARING ON HEREDITY AND VARIATION 12 HEREDITY: AN INTERNATIONAL JOURNAL OF GENETICS 12 Genes 11 Mutation 11 Evolution 10 GENETIC 9 DNA 8 Molecular genetics 7 Cell Division 6 Chromosome 6 Gene Mutation 6 Human genetics 6 sex determination 6 Cytoplasmic inheritance 5 Microbiology 5 THE JOURNAL OF HEREDITY 5 genetics 5 Mendelism 4 Recombinant DNA 4 cytogenetics 4 Animal Heredity 3 Bacteria 3