tandem array Repetitive DNA, where the repeating units are contiguous. Some genes of high copy number occur in tandem arrays e.g. ribosomal DNA in eukaryotes). Satellite DNA is also often arranged in tandem arrays. Such DNA regions are prone to the genetic processes of unequal crossing over and replication slippage.
tandem array (in genetics) A series of copies of a gene arranged in tandem along a chromosome. Nucleolar organizers, for example, can contain up to 250 copies of a single ribosomal RNA (rRNA) gene in tandem. Genes for histone proteins also occur in tandem arrays. Such arrays ensure that large amounts of the gene product are synthesized by the cell.
More From encyclopedia.com
Imprinting , Definition Genetic imprinting is the differential expression of a gene depending on whether it was maternally or paternally inherited. It is a method… Genes , A common feature of organisms is that offspring tend to look like their parents. For example, tall, brown-eyed parents tend to have tall, brown-eyed… Pseudogenes , Pseudogenes are defective copies of functional genes. These may be partial or complete duplicates derived from polypeptide-encoding genes or RNA gene… Methylation , DNA methylation is a mechanism used to regulate genes and protect DNA from some types of cleavage. It is one of the regulatory processes that are ref… Operon , Operon An operon is a genetic regulatory system found in prokaryotes and the bacterial viruses (bacteriophages ) that attack bacteria. It is a cluste… Transposon , Transposons, also called transposable elements or jumping genes , are stretches of deoxyribonucleic acid (DNA) that can move around an organism's chr…
About this article
All Sources -
Updated About encyclopedia.com content Print Topic
You Might Also Like