which indicates that an individual who is heterozygous at two neighboring
loci has the two mutations in question on the same chromosome
Definition from: GeneReviews
from the University of Washington and the National Center for Biotechnology Information
1: Characterized by having certain atoms or groups of atoms on the same side of the longitudinal axis of a double bond or of the plane of a ring in a molecule.
2: Relating to or being an arrangement of two very closely linked genes in the heterozygous condition in which both mutant alleles are on one chromosome and both wild-type alleles are on the homologous chromosome.