Which type of traits involve more than one pair of genes and environmental influences?

Multifactorial traits involve the interaction of multiple pairs of genes along with environmental influences. These traits are not determined by a single gene but rather by the contributions of several genes (polygenic) and environmental factors that affect the expression of these genes. Examples include traits such as height, skin color, and susceptibility to certain diseases, which showcase variability due to both genetics and environmental contexts.

Quantitative traits, while also influenced by more than one pair of genes, don't necessarily emphasize environmental factors as strongly as multifactorial traits. Simple and monogenic traits are influenced primarily by single genes and do not encompass the complexity brought in by multiple genes and varying environmental conditions, which are key features of multifactorial traits.