Researchers have conducted several experiments to study the impact of genes on the behaviour of humans. Research comparing “identical and fraternal twins” (Roediger, Rushton, Capaldi, &Paris, 1987, p. 505) has been evaluated to study the impact of genes on any single characteristic or traits (Erdle, 1990). The debate among scholars regarding the impact of genes upon the behaviour on individuals crucial to understand the behaviours of humans, but most of them agree that the impact of external factors such as family, culture, society and the environment on the behaviour of individuals is immense (Gazzaniga, 1985, 1988; Springer, 1989). It can be concluded that internal factors such as genes work in unison with the environmental to shape the personalities and behaviours of individuals…What theory of Human Development makes a person what they are? Why does a person do what they do? Where does personality come from and how does it grow? These are some frequently asked questions when discussing the topic of personality.
Personality does originate from a specific point, and from then on it continues to grow and become exponentially more complex. There are some commonly made assumptions when developing a personality theory. The first of these assumptions
concerns