Interspersed repetitive DNA is found in all eukaryotic genomes. These sequences propagate themselves by RNA mediated transposition and they have been called retroposons. Interspersed repetitive DNA elements allow new genes to evolve. They do this by uncoupling similar DNA sequences from gene conversion. SINE, or short interspersed repeats, are specialized for uncoupling DNA sequences from intrachromosomal gene conversion, while LINE, or long interspersed repeats, are specialized for uncoupling DNA sequences from interchromosmal gene conversion. In both cases, the interspersed repeats block gene conversion by inserting regions of non-homology within otherwise similar DNA sequences. More details of this mechanism may be found at http://www.repetitive-dna.org Genome is also a popular science book by Matt Ridley. ... Retrotransposons are mobile genetic elements and are ubiquitous in the genomes of many eukaryotic organisms. ... This article may be too technical for most readers to understand. ...
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