genetic marker

American  

noun

1. any distinct inheritable indicator of identity and ancestry.

2. HLA antigen.

3. a chromosomal landmark or allele that allows for the tracing of a specific region of DNA, as in the study of recombination.

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genetic marker British  

noun

1. a gene with two or more alternative forms, producing readily identifiable variations in a particular character, used in studies of linkage, genetic mapping, and identification of the presence of other genes that are closely linked to, and therefore usually inherited with, it

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genetic marker Scientific  

1. A gene or DNA sequence having a known location on a chromosome. Genetic markers associated with certain diseases can be used to determine whether an individual is at risk for developing an inherited disease.

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Etymology

Origin of genetic marker

First recorded in 1945–50

Example Sentences

Ideaya’s treatment targets an aggressive form of uveal melanoma that generally has a poor prognosis because it occurs in patients who lack the genetic marker to receive typical immunotherapy.

From Barron's • Apr. 13, 2026

Each vertebrate species has its own version of this genetic marker.

From Science Daily • Jan. 15, 2026

The research gives a reliable genetic marker for plant breeders to know what strains they are dealing with.

From Salon • Oct. 2, 2023

“Here’s good evidence that a strongly African genetic marker shows up really early,” says Louisiana State University geographer Andrew Sluyter, who was not involved in the research.

From Science Magazine • Sep. 22, 2023

He told them to go back to their labs after the conference and start testing cells for the G6PD-A genetic marker, to see how widespread this problem might be.

From "The Immortal Life of Henrietta Lacks" by Rebecca Skloot