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Nature vs Nurture

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Nature vs. Nurture - Twin Studies
Eimy Ramirez
PSY304
Prof. Reed April 11, 2015

Abstract
The exponential growth of scientific and biological knowledge over time has facilitated the genesis of fields of specialization, namely biological determinism, sociobiology and eugenics, just to mention a few. The common thread between these fields is their proponents collectively postulate that all human traits, including weight, strength, intelligence, aspects of personality such as temperament (aggression for example), criminality and morality, are ultimately determined by the information encoded in DNA. They espouse that "we are who we are" because of our genes solely; that biodiversity in man is ultimately precipitated by phenotypic variations, caused by purely genetic differences, amongst individuals, therefore ostensibly offering little or no gravity to non-genetic factors. Non-genetic factors, generically labelled as the environment, encompass not only the physical, chemical and biological criterion, but also the numerous social and psychological ones that shape our lives as we grow and mature. Can we seriously take the influence of the environment, an intangible but nonetheless powerful force we experience every single day, out of the equation? Are we really who we are simply because our genes deem it so? What happens when you examine twins who have the same genes but were raised in different environments?
Nature versus Nurture

For years, the nature versus nurture debate has had people struggling to explain what makes them who they are. Studies performed on identical twins, which have been separated at birth, have come the closest to ending this debate. However, the topic of discussion is still left without a clear victor. The debate is between two different beliefs regarding what makes a person “who they are” mentally and

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