onelocus
Onelocus is a term used in genetics to refer to a trait or phenotype that is determined primarily by a single genetic locus. It describes a situation where variation in the trait is largely attributable to allelic differences at one specific location on the genome, in contrast to polygenic traits that are influenced by many loci. In many contexts, onelocus is used informally to highlight a monogenic basis for a phenotype and to distinguish it from complex traits with multifactorial or multifocal inheritance patterns.
In practice, traits described as onelocus follow patterns consistent with Mendelian inheritance, including dominance, recessivity, or
The term is often descriptive rather than a formal classification; some traits once thought to be controlled
See also: locus, single-gene trait, Mendelian inheritance, genetic mapping, monogenic.