What is an example of a trait that could be influenced by polygenic inheritance?

Skin pigmentation is an example of a trait that could be influenced by polygenic inheritance because it is determined by multiple genes that interact to produce a continuous range of phenotypes. In humans, skin color is affected by several genes, each contributing various degrees of pigment production, leading to a spectrum of skin tones within the population. This kind of inheritance contrasts with traits influenced by a single gene, which typically result in distinct categories or phenotypes. For example, blood type is determined by a single gene with multiple alleles, while the color of pea seeds and flower color in snapdragons are influenced by specific gene interactions that do not exhibit the same continuous variation seen in skin pigmentation.