Chromosomes are found in every living cell. They are made up of strands of DNA. In DNA there are parts called genes (Manda, A, 2014). Genetics is the study of heredity. Heredity is a biological process by which parents pass certain genes to their children. Every child inherits genes from their parents and these genes turn into traits (Manda, A, 2014). Arnold Gessel (2013) believed that a child is born with a set of generic instructions passed down from his or her parents. Gessel believed that these generic instructions would develop over time. Gessel believed that the environment had no impact on an individual's behavior and that it was purely genetic (Cherry, 2012). Gessel (2013) stated that the environment would only support these generic instructions. This theory would suggest that everything that happened in J's life would be predetermined before he was even born. An individual's behavior can also be influenced by other people. In society, people are expected to behave in a certain way. Social situations carry a set of expectations about the right way to behave (McLeod,