Your personality is determined by your DNA. Your family history determines your intelligence. You were born gay. The idea that genetics influence a person's personality, behavior and sexuality is a very old concept... A person's personality is influenced by their behavior. (Higgins, 2000) “Human behavior is a loosely defined foundation of individuality, generally considered to be influenced and developed by the environment. However, recent molecular studies have highlighted genetic factors that suggest a more biological origin of the behavior." (Deering, 2014) Twin and adoption studies have shown that behavioral characteristics can be genetic, such as self-esteem, various personality traits, general intelligence, and academic achievement. Until the 1960s, researchers looking for the origin of human behavior looked at environmental factors, such as attributing schizophrenia to bad parenting. However, due to the increased risk of relapse in close relatives and the high concordance between identical twins, schizophrenia is believed to be genetic, but also has a high environmental component. (Lewis,1997, p. 133) The greater the genetic contribution to the expression of a trait, the greater the possibility of inheriting that trait. (Stine, 1989, p.151) Studies have shown that behavior can be inherited in more than one way. In the 1980s, researchers attempting to isolate the gene that caused bipolar affective disorder identified three different chromosomes that predispose a person to this very distinct pattern of behavior, yet the association of a gene with a behavior is usually only partially conclusive. (Deering, 2014) Behavior depends on the interaction of multiple genetic sequences with the environment... half of article ......ct linking this research to human behavior, scientists believe it is possible that l Homosexuality is genetic. Works CitedDeering, R. 2014. Behavioral Genetic Determinism: Do Genes Equal Behavior?. [online] Available at: http://serendip.brynmawr.edu/bb/neuro/neuro02/web3/rdeering.html [Accessed: 1 March 2014].Higgins, E.T. 2000. Does personality provide unique explanations for behavior? Personality as interpersonal variability in general principles. European Journal of Personality, 14 (5), pp. 391--406. Lewis, R. 1997. Human genetics. 2nd ed. Dubuque, IA: Wm. C. Brown.Plomin, R. and Petrill, S.A. 1997. Genetics and intelligence: what's new?. Intelligence, 24 (1), pp. 53-77. Stine, G.J. 1989. The new human genetics. Dubuque, Iowa: Wm. C. Brown.Woodhead, A.D. and Barnhart, B.J. 1988. Biotechnology and the human genome. New York: Plenum Press.