Genes 160 Genetics 100 Gene expression 58 Genetic engineering 54 DNA 47 Gene mapping 41 Genetic Engineering, Gene Transfer and Transgenics, (New June 2002) 36 Genomics 34 Gene 33 Biotechnology 30 Plant Breeding and Genetics 28 Gene therapy 26 RNA 26 Chromosomes 23 Molecular genetics 23 Proteins 23 genetics 23 GENE 22 Gene Expression Regulation 22 Genetically engineered organisms 21 Genomes 21 Molecular biology 21 Transgenic plants 21 Plants 20 Genetic regulation 19 GENES 18 Heredity 18 Genome 17 Molecular structure-- Gene mapping--Nucleotide sequence 16 Biochemistry 15