Here's a breakdown:

* Polygenic: Meaning "many genes".

* Inheritance: Refers to the passing of traits from parents to offspring.

How it works:

Instead of a single gene determining a trait, multiple genes contribute to the overall expression. Each gene might have a small effect, and the combined effect of all these genes determines the final characteristic. This leads to a wide range of possibilities for the trait, often following a bell-shaped distribution.

Examples of polygenic traits:

* Height: Many genes influence height, making it possible for individuals to have a wide range of heights within a population.

* Skin color: A complex interplay of multiple genes determines skin pigmentation, resulting in diverse skin tones.

* Eye color: While a single gene is primarily responsible for the basic color (brown, blue, etc.), other genes influence the intensity and variations within those colors.

* Intelligence: While there is a genetic component to intelligence, it is a complex trait influenced by numerous genes and environmental factors.

Key points to remember:

* Polygenic traits typically show continuous variation (a range of possibilities) rather than discrete categories.

* Environmental factors can also influence polygenic traits.

* Polygenic inheritance is more common than single-gene inheritance for complex traits.