linkage marker

link·age mark·'er

a locus at which there is a high probability of heterozygotes (indispensible state for linkage analysis), but in itself perhaps of no clinical interest.
See also: marker locus.

link·age mark·er

(lingk'ăj mahr'kĕr) A locus at which there is a high probability of heterozygotes (indispensible state for linkage analysis), but in itself perhaps of no clinical interest.