Definition: Genetics markers are changes in the ordering sequence of DNA that may increase the risk of developing a particular disease.
These alterations in DNA can be hereditary (inherited from a parent) or aquired as the result of a mutation in DNA. DNA mutations can be caused by several factors, one being the environmental toxins in tobacco smoke.
Scientists are looking for genetic markers for lung cancer to determine who is most at risk for the disease.
Genetic markers are different than tumor markers, which are substances found in the body that can be elevated with cancer.
