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:
- 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