What is a retrotransposon (retroposon) ?

-A transposon that mobilizes via an RNA form; the DNA element is transcribed into RNA, and then reverse-transcribed into DNA, which is inserted at a new site in the genome. It does not have an infective (viral) form. -they contain long terminal repeats (LTRs) are referred to as retrotransposons, while non-LTR-containing retrotransposons are referred to as retroposons.