What are characteristics that cannot be inherited?

Characteristics that cannot be inherited are typically those influenced by environmental factors rather than genetic factors. These include traits like learned behaviors, skills, and experiences, as well as physical attributes shaped by environmental conditions, such as scars or muscle tone developed through exercise. Additionally, certain health conditions resulting from lifestyle choices, like diet or exposure to toxins, are also non-heritable. Essentially, these traits arise from interactions with the environment rather than genetic transmission.