transposon

/trænzˈpoʊzɑn/
noun
  1. A segment of DNA that can move to different positions within the genome of a cell.
    • The discovery of transposons earned Barbara McClintock a Nobel Prize.
    • Transposons are sometimes called 'jumping genes' because they can move around.
    • Scientists use transposons to study gene function by inserting them into DNA.