Here's a breakdown:

* Genes: These are segments of DNA that contain instructions for building and maintaining an organism. They are passed down from parents to offspring.

* Traits: These are specific characteristics or features of an organism, such as eye color, height, or hair texture.

* Inheritance: The process by which genes are passed from one generation to the next.

So, inherited physical traits are determined by the specific genes that an individual receives from their parents. These genes provide the blueprint for how the body develops and functions, leading to the expression of various traits.