gene recombination;  genetically modified;  GM
 DNA test;  genetic test;  genetic testing
 tumour suppressor gene;  tumor suppressor gene
 transgenesis;  transgenics;  gene transfer
 regulator gene;  regulatory gene
 immune response gene;  IR gene
 control gene;  regulator gene;  regulatory gene
 immediate early gene;  IEG
 major histocompatibility complex;  MHC
 CLOCK gene;  Circadian Locomotor Output Cycles Kaput gene