How is behavior of human is related to genetic characters and heredity?

human behaviour is related entirely to genetics and herididty.There are many traits that can be attributed to heredity. Freckles on a person's face can be attributed to a gene that one of the parents of this person was carrying. However, physical attributes are not the only traits that can be credited to our parent's genes. A person with anxiety, depression, schizophrenia, and many other mental illnesses have a tendency to also have a family history of the illness. According to Morris and Maisto (2005), "Siblings of people with schizophrenia are about eight times more likely, and the children of schizophrenic parents about ten times more likely, to develop the disorder than someone chosen randomly from the general population." As with some physical traits, the predisposition to mental illness does not always dictate whether the person will get the disease. Having a blood relative with the disease just increases the chances that the same disease will be apparent within the same family.