A genetic marker gene is a specific gene in an organism's DNA that can help scientists and doctors identify an individual trait or disease. Think of it like a biological "flag" that can show where certain characteristics or conditions are located in your genetic code. These genes are useful in diagnosing genetic disorders, studying family traits, or tracking how traits are passed down from one generation to another. Genetic marker genes can also be used in scientific research to learn more about how genes work and interact with each other.
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