text: A<unk>  is a known DNA sequence. It can be described as a variation, which may arise due to mutation or alteration in the genomic loci, that can be observed. A<unk>  may be a short DNA sequence, such as a sequence surrounding a single base-pair change (single nucleotide polymorphism), or a long one, like microsatellites.
option_0: Genetic marker
option_1: Biomarker
option_2: Nanosensor
option_3: Pharmacogenetics
option_4: Diagnostic test
option_5: CHADS2 score
option_6: Spectroscopy
option_7: Selectable marker