Genetic Marker

From WikiMD's Wellness Encyclopedia

Genetic Marker

A Genetic Marker is a gene or DNA sequence with a known location on a chromosome that can be used to identify individuals or species. It can be described as a variation, which may arise due to mutation or alteration in the genomic loci, that can be observed. A genetic marker may be a short DNA sequence, such as a sequence surrounding a single base-pair change (single nucleotide polymorphism, SNP), or a long one, like minisatellites.

Types of Genetic Markers[edit | edit source]

There are different types of genetic markers, including:

  • Short tandem repeats (STR): Also known as microsatellites. They are much easier to use but have a higher mutation rate than RFLPs or SNPs.

Uses of Genetic Markers[edit | edit source]

Genetic markers can be used for various purposes, such as:

  • Genetic mapping: Genetic markers are used to study the linkage of different genes.
  • Parentage testing: Genetic markers can be used to confirm the biological parent of an individual.

See Also[edit | edit source]

References[edit | edit source]


Genetic Marker Resources

Contributors: Prab R. Tumpati, MD