Categories of repetitive DNA in the human genome

    More than half of the human genome consists of non-protein-coding, repetitive DNA elements. These occur in several families with specific characteristics. The most important of these are highly-repetitive DNAs that  are detected as satellite DNA in ultracentrifugation experiments; tandem repeats where specific DNA sequences are repeated end-to-end from a few to many tens of times, and interspersed repeats in which a particular sequence occurs at multiple locations.

Figure © 2000 by Klug & Cummings; all text material © 2008 by Steven M. Carr