The experiences and qualifications that a person earns during their lifetime are examples of acquired traits. These traits are not inherited, they do not affect the genetic makeup. They are developed due to direct affect of the environment. Thus they are not passed to the next generation. Piercing of ear or large sized muscles of the wrestler are no carried by the next generation. Traits can only be passed on to the next generation only where they have some direct effect on the genes. For example, mutation is caused in the germ cells of a person due to exposure to some harmful radiations, it is likely that the mutation will be passed on to the subsequent generations.