Genetic marker

A genetic marker is a gene or DNA sequence with a known location on a chromosome that can be used to identify individuals or species.

This prompted the development of gene markers, which could identify genetic characteristics that are not readily observable in organisms (such as protein variation).

Genetic markers have to be easily identifiable, associated with a specific locus, and highly polymorphic, because homozygotes do not provide any information.

With the aid of genetic markers, researchers were able to provide conclusive evidence that the cancerous tumor cell evolved into a transmissible parasite.

Furthermore, molecular genetic markers were used to resolve the issue of natural transmission, the breed of origin (phylogenetics), and the age of the canine tumor.