Genes Genetics 39 DNA 31 Proteins 20 RNA 20 Genome 14 Genomes 13 Genetic Processes 11 Genetic engineering 10 Gene expression 9 Chromosomes 8 Heredity 7 Molecular genetics 7 Biology 6 Enzymes 6 Molecular biology 6 Viral chromosomes 6 Animal Genetics and Breeding, (New March 2000) 5 Biotechnology 5 Polygenes 5 Evolution 4 Gene mapping 4 Genetic Engineering, Gene Transfer and Transgenics, (New June 2002) 4 Genetic regulation 4 Molecular Biology and Molecular Genetics, (Discontinued March 2000, Reinstated and Revised June 2002) 4 Proteins-Genetics 4 Recombinant DNA 4 Biochemistry 3 DNA replication 3 Developmental genetics 3