Definitions for "Complex trait"
a phenotype resulting from multilocus determination coupled with multiple environmental influences
A trait caused by genes and the environment. 276
a trait which has a genetic component that is not strictly Mendelian (dominant, recessive, or sex-linked). Complex diseases are characterized by risk to relatives of an affected individual which is greater than the incidence of the disorder in the population. Complex traits may involve the interaction of two or more genes to produce a phenotype, or may involve gene-environment interactions. [Source: NHBLI/NCBI Glossary