Genetic Marker

{
  "id": "MLC-T-ENV-012209",
  "term": "Genetic Marker",
  "field": "Environment",
  "definition": "1. An easily discerned attribute or probe that indicates the genotype of an individual at a locus. Examples include molecular markers (usually DNA-based), cytological markers, and morphological markers.\n\n2. An identifiable segment of DNA (e.g., RFLP, VNTR, microsatellite) with enough variation between individuals that its inheritance and co-inheritance with alleles of a given gene can be traced; used in linkage analysis.\n\n3. A marker is a DNA sequence with a known physical location on a chromosome. Markers can help link an inherited disease with the responsible genes. DNA segments close to each other on a chromosome tend to be inherited together. Markers are used to track the inheritance of a nearby gene that has not yet been identified but whose approximate location is known. The marker itself may be a part of a gene or may have no known function.",
  "references": [
    "EPA Genetic Diversity as an Indicator of Ecosystem Condition and Sustainability Glossary at http://www.epa.gov/eerd/Glossary-%20Genetic%20Diversity.pdf",
    "NIH Genetics Home Reference Glossary"
  ],
  "url": "https://mlchart.com/terminology/environment/genetic-marker/"
}