AP BIOLOGY

Detailed explanation-1: -DNA transposons are DNA sequences, sometimes referred to “jumping genes", that can move and integrate to different locations within the genome. They are class II transposable elements (TEs) that move through a DNA intermediate, as opposed to class I TEs, retrotransposons, that move through an RNA intermediate.

Detailed explanation-2: -Eukaryotes contain numerous transposable or mobile elements capable of parasite-like proliferation in the host genome. All known transposable elements in eukaryotes belong to two types: retrotransposons and DNA transposons.

Detailed explanation-3: -DNA transposition is the movement of a defined DNA segment (a transposon) from one genomic site to another; the ends of a transposon are specific, but the integration sites generally are relatively random. Movement is catalyzed by a transposon-encoded transposase.

Detailed explanation-4: -Transposable elements (TEs) are mobile DNA sequences that propagate within genomes. Through diverse invasion strategies, TEs have come to occupy a substantial fraction of nearly all eukaryotic genomes and they represent a major source of genetic variation and novelty.