Dictionary > Interspersed repeat

Interspersed repeat

Definition
noun, plural: interspersed repeats
A type of repeated sequence in which the copies are dispersed throughout the genome and not side by side
Supplement
The repeated sequences occur as multiple copies of nucleic acids in the genome. These repeats may involve the DNA or the RNA. There are three major types of repeated sequences: (1) terminal repeats, (2) tandem repeats, and (3) interspersed repeats.
Interspersed repeats are repeated sequence wherein the copies are interspersed, i.e. dispersed throughout the genome. This makes it different from the tandem repeats wherein the copies lie side by side. In the interspersed repeats, the copies are nonadjacent.
Interspersed repeats are present in all the genomes of the eukaryotes. Transposable elements (transposons), such as DNA transposons and retrotransposons, are interspersed repeats.
One possible importance of interspersed repeats is to allow new genes to evolve by uncoupling the gene conversion network. For instance, the Alu elements are specialized for uncoupling intrachromosomal gene. Another example is the long interspersed nuclear elements (LINEs) specialized for uncoupling interchromosomal gene conversion. These repeats are therefore essential in promoting evolution and the development of new species.
See also:

  • repeated sequence
  • transposable element
  • DNA transposon
  • retrotransposon
  • Alu element
  • long interspersed nuclear element


You will also like...

Chemical composition of the body
Chemical Composition of the Body

The body is comprised of different elements with hydrogen, oxygen, carbon, and nitrogen as the major four. This tutorial..

Kidneys
Kidneys and Regulation of Water and Inorganic Ions

The kidneys are responsible for the regulation of water and inorganic ions. Read this tutorial to learn about the differ..

Types and Causes of Brain Damage
Types and Causes of Brain Damage

This tutorial describes the different types and causes of brain damage. Find out how genetics, physical injury, lack of ..

Thermographic image of face and neck
Regulation of Organic Metabolism, Growth and Energy Balance

The human body is capable of regulating growth and energy balance through various feedback mechanisms. Get to know the e..

complete-dominance
Dominance

This tutorial presents Gregor Mendel's law of dominance. Learn more about this form of inheritance and how it can be pre..

Biological Cell schematic diagram
Biological Cell Introduction

It only takes one biological cell to create an organism. A single cell is able to keep itself functional through its 'mi..

Related Articles...

No related articles found

See all Related Topics