Heredity refers to a process of self-reproduction in which organisms ingest the material in the environment in accordance with the same development pathways and methods experienced by their parents, and produce replicas similar to their parents. Which of the following are genetic:. ['Lao Zhang is a veteran in the business, and his son Xiao Zhang is also very good at business.', 'Wang has a red bean-shaped mole on his brows, and his son also grew a mole on the same part when he was three years old.', 'Zhao had a mental illness, and his father also had this mental illness.', 'Liu is very good at playing table tennis, and his daughter also likes playing table tennis.']