Interspersed repeat

Interspersed repetitive DNA is found in all eukaryotic genomes. They differ from tandem repeat DNA in that rather than the repeat sequences coming right after one another, they are dispersed throughout the genome and nonadjacent. The sequence that repeats can vary depending on the type of organism, and many other factors. Certain classes of interspersed repeat sequences propagate themselves by RNA mediated transposition; they have been called retrotransposons, and they constitute 25–40% of most mammalian genomes. Some types of interspersed repetitive DNA elements allow new genes to evolve by uncoupling similar DNA sequences from gene conversion during meiosis.^[1]

^ Schimenti JC, Duncan CH (February 1984). "Ruminant globin gene structures suggest an evolutionary role for Alu-type repeats". Nucleic Acids Res. 12 (3): 1641–55. doi:10.1093/nar/12.3.1641. PMC 318605. PMID 6322113.

[1] Schimenti JC, Duncan CH (February 1984). "Ruminant globin gene structures suggest an evolutionary role for Alu-type repeats". Nucleic Acids Res. 12 (3): 1641–55. doi:10.1093/nar/12.3.1641. PMC 318605. PMID 6322113.

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