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Repeated sequences are patterns of nucleic acids that occur in multiple copies throughout the genome. Repetitive DNA was first detected because of its rapid re-association kinetics. In many organisms, a significant fraction of the genomic DNA is highly repetitive, with over two-thirds of the sequence consisting of repetitive elements in humans.
Repetitive elements found in genomes fall into different classes, depending on their structure and/or the mode of multiplication. The disposition of repetitive elements consists either in arrays of tandemly repeated sequences, or in repeats dispersed throughout the genome.
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