The inheritance of acquired characters is an important concept in the history of biological and physical anthropology that explains the possible transmission of traits developed by organisms during their lifetime to their offspring. This idea is mainly associated with the French naturalist Jean-Baptiste Lamarck, who proposed one of the earliest theories of evolution. According to Lamarck, organisms change over time due to environmental influences, and these acquired changes can be inherited by future generations. Lamarck’s theory was based on two major principles: the use and disuse of organs and the inheritance of acquired characteristics. The principle of use and disuse suggests that organs or body parts that are frequently used become stronger and more developed, while those that are not used gradually become weak and disappear. For example, Lamarck explained that the long neck of the giraffe developed because ancestral giraffes continuously stretched their necks to reach leaves on tall trees. The increased length of the neck acquired during their lifetime was believed to be passed on to