Chromosomes Genetics 37 Biology 21 Heredity 17 Cytogenetics 16 Cell Division 9 Linkage 9 Mitosis 9 Sex determination 9 Genes 8 Meiosis 8 Mendelism 8 Microbiology 8 Cell division 7 sex determination 7 Cytology 6 Cytoplasmic inheritance 6 Evolution 6 Gene Mutation 6 Mutation 6 Morphology 5 Cell 4 Cells 4 Human genetics 4 Molecular biology 4 Molecular genetics 4 Physical anthropology 4 Botany 3 DNA 3 Floral Anatomy 3