1) Known DNA sequence 
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...
Alteration in DNA that may indicate an increased risk of developing a specific disease or disorder.
A segment of DNA with an identifiable physical location on a chromosome and whose inheritance can be followed. A marker can be a gene, or it can be some section of DNA with no known function. Because DNA segments that lie near each other on a chromosome tend to be inherited together, markers are oft...
A gene or group of genes used to 'mark' or track the action of microbes.
A gene which has an easily identifiable phenotype so that one can tell apart cells or individuals which have the gene and those which do not have it. Such a gene can also be used as a probe to mark cell nuclei or chromosomes so that they can easily be isolated or identified from other nuclei or chromosomes later. ... (09 Oct 1997) ... 
A gene or other identifiable portion of dna whose inheritance can be followed.
Any mutant gene useful in genetic analysis.
A DNA sequence with a known physical location on a chromosome. Genetic markers can help link an inherited disease with the responsible gene.
Any segment of DNA that can be identified, or whose chromosomal location is known, so that it can be used as a reference point to map or locate other genes. Any gene which has an identifiable phenotype that can be used to track the presence or absence of other genes on the same piece of DNA transferred into a cell
Type: Term Synonyms: genetic determinant
Genes located close to a gene of interest on the same chromosome.
[n] - a specific gene that produces a recognizable trait and can be used in family or population studies
noun a specific gene that produces a recognizable trait and can be used in family or population studies