tandem repeat


: any of several identical DNA segments lying one after the other in a sequence

Examples of tandem repeat in a Sentence

Recent Examples on the Web The human dopamine receptor D4 (DRD4) gene contains a 48-bp variable number of tandem repeat (VNTR) in exon 3, encoding the third intracellular loop of this dopamine receptor. Razib Khan, Discover Magazine, 9 Mar. 2012 Scientists began by testing the short tandem repeat (STR) markers on the nuclear DNA. Emilie Le Beau Lucchesi, Discover Magazine, 15 Apr. 2022 Instead of sequencing whole genes as cutting-edge academic research labs often do, forensics labs look for something called short tandem repeats (STR). Sarah Zhang, The Atlantic, 22 Sep. 2017

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'tandem repeat.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

First Known Use

1973, in the meaning defined above

Time Traveler
The first known use of tandem repeat was in 1973

Dictionary Entries Near tandem repeat

Cite this Entry

“Tandem repeat.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/tandem%20repeat. Accessed 3 Dec. 2023.

Medical Definition

tandem repeat

tan·​dem repeat ˈtan-dəm- How to pronounce tandem repeat (audio)
: any of several identical DNA segments lying one after the other in a sequence
Although certain of these repetitive sequences are scattered throughout the DNA, others are reiterated many times in a row, so that they resemble the DNA equivalent of a stutter. These tandem repeats are usually found in critical regions, notably in the centromere …Robert K. Moyzis, Scientific American
The DNA fingerprint technique is based on the existence of regions of DNA that are made up of tandem repeatsRoger Levin, Science
compare long terminal repeat
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