What is the term that refers to the determination of a given trait that is a result of the interaction of many genes?

"Polygenic" is the term that refers to the determination of a given trait that is a result of the interaction of many genes. Traits such as height, skin, color are polygenic.

Polygenic traits do not show the phenotypic ration that charecterizes Mendelian Inheritance eventhough the trait is inherited as stated by Gregor Mendel. Many Polygenic traits are often influenced by the environmental factors.