polygene

Any of a group of nonallelic genes, each having a small quantitative effect, that together produce a wide range of phenotypic variation.

Noting those volcanic cones which are the result of successive eruptions: contrasted with monogene. The term was suggested by A. Stübel.

A group of nonallelic genes that act together to produce phenotype variations

a gene that by itself has little effect on the phenotype but which can act together with others to produce observable variations