Genetics Biology 61 Heredity 44 Microbiology 41 Genes 39 Evolution 38 Chromosomes 37 Mutation 31 DNA 28 Molecular genetics 28 Biotechnology 23 Molecular biology 23 Morphology 19 Cytogenetics 18 Ecology 18 Plant breeding 18 Cytology 17 Genomics 17 Metabolism 16 Cell division 14 Chromosome 14 Biochemistry 13 Genome 13 Animal Genetics and Breeding, (New March 2000) 12 Bioinformatics 12 cytogenetics 12 heredity 12 Population genetics 11 Botany 10 Gene expression 10