What kind of traits are present when many different genes control a single trait such as skin color?

When many different genes control a single trait, such as skin color, the trait is described as polygenic. This results in a continuous range of phenotypes rather than distinct categories, leading to variations in skin color that can be influenced by multiple alleles. Additionally, the interaction of these genes can produce additive effects, where the contributions of each gene combine to create a spectrum of expression. This complexity often reflects the influence of environmental factors as well, further shaping the trait.