DNA element with ability to change position iS called

Transposon is aDNA segment or genetic element moving from one chromosome to another. The 'term', was introduced by R W Hedges and A E Jacob in 1974, to'controlling elements' orjumping genes', discovered by Barbara McClintock (1950) in maize.Cistron is the functional unit of DNA molecules, it codes for a particular gene product. $\square$ Recon is the cross-over unit or it is segment of DNA which participates in crossing over. 'Introns are the interrupted genes or those regions of a gene which do not form the part of $m R N A$ and are removed from primary $m \mathrm{RNA}$ during gene expression in eukaryotes. These are non-coding sequences which get removed during splicing and processing.