Chromosomes 165 Genetics 130 Cytology 56 Chromosome 41 CHROMOSOMA 36 MUTATION 36 Molecular biology 35 Biology 33 Cytogenetics 27 Heredity 26 Molecular Biology 25 Cells 23 Genes 23 chromosomes 21 CHROMOSOME 20 Mutation 20 Genomics 18 Biochemistry 17 DNA 16 Histology 15 Mitosis 15 Cell biology 14 Molecular genetics 14 cytogenetics 14 Evolution 13 Gene mapping 13 Linkage 13 genetics 13 CHROMOSOMES 12 Chromosome Mapping 12