Tandem repeat

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Tandem Repeat

A Tandem Repeat (pronunciation: /ˈtandəm riˈpēt/) is a sequence of two or more DNA base pairs that are repeated directly adjacent to each other. These repeats can range from two base pairs to tens of base pairs, and can repeat from just a few times to hundreds of times.

Etymology

The term "Tandem Repeat" originates from the Latin word 'tandem', meaning 'at length', and the English word 'repeat', which refers to the act of doing something again either once or multiple times. In the context of genetics, it refers to the repetition of a sequence of DNA.

Related Terms

  • Microsatellites: Also known as Short Tandem Repeats (STRs), these are a type of tandem repeat where the repeated sequence is very short, usually 2-5 base pairs.
  • Minisatellites: These are a type of tandem repeat where the repeated sequence is longer, usually 10-60 base pairs.
  • Satellite DNA: This is a type of DNA that consists of very large arrays of tandemly repeating, non-coding DNA.
  • Variable Number Tandem Repeat (VNTR): This is a location in a genome where a short nucleotide sequence is organized as a tandem repeat. These can be found on many chromosomes, and often show variations in length (number of repeats) among individuals.

See Also

External links

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