lokus

Lokus is a term used in several languages to denote a position or place. It is derived from the Latin locus, meaning "place." In many contexts, lokus is the spelling used for the English word locus when referring to a fixed position within a biological or mathematical system.

In genetics, a lokus is the fixed position of a gene or genetic marker on a chromosome. The locus is the reference point used in genetic mapping, inheritance studies, and the study of how variations at a lokus affect traits. Different alleles at a lokus can influence phenotypes, and mutations at a lokus can cause genetic disorders. Mapping lokuses across the genome underpins genome-wide association studies and linkage analyses.

In geometry, a lokus refers to the set of points that satisfy a given condition. The concept, originating from the Latin "locus" meaning place, is used to describe objects such as the locus of points at a fixed distance from a given point (a circle) or the locus of points equidistant from two fixed points (a perpendicular bisector). Loci can define curves, surfaces, and regions without enumerating every point.

Because it signals a translation or variant spelling of "locus," lokus appears in biology and mathematics primarily as a term tied to position or place, with the spelling reflecting language differences rather than a distinct scientific concept.