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In genetics, a biomarker (identified as genetic marker) is a DNA sequence that causes disease or is associated with susceptibility to disease. They can be used to create genetic maps of whatever organism is being studied.ne example of a commonly used biomarker in medicine is prostate-specific antigen (PSA). This marker can be measured as a proxy of prostate size with rapid changes potentially indicating cancer.
Biomarkers are characteristics of the body that you can measure. So your blood pressure is actually a biomarker. Biomarkers are very important to medicine in general. Weâre all used to going to the doctor and getting all our test results, right, and even imaging â x-ray results or CAT scans â those are biomarkers that tell how the bodyâs doing, and theyâre measurable.