Back علامة جينية Arabic Genetički marker BS Marcador genètic Catalan Genetický marker Czech Marker (Genetik) German Marcador genético Spanish نشانگر ژنتیکی Persian Geenimerkki Finnish Marqueur génétique French סמן גנטי HE
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.