What Are Some Examples of Polygenic Inheritance?

Examples of polygenic inheritance in humans include height, eye color and skin color. Physical traits that have polygenic inheritance are influenced by more than one gene and typically display a continuous distribution, such as a range of heights. Polygenic traits do not have the classic phenotypic ratios of Mendalian inheritance.

The following are also examples of polygenic traits in humans:

  • Weight
  • Lupus
  • Fingerprints
  • Heart health
  • Behavioral traits

These traits have the following genetic characteristics:

  • At least two genes contribute to the phenotypic expression
  • The traits are typically quantified using measurement, rather than counting as with Mendalian inheritance
  • The phenotypic expression of the trait can vary over a wide range