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Homosexuality, Nature vs. Nurture

Western Governors University

Homosexuality, Nature vs. Nurture
Nature versus nurture is one of the most enduring debates in the psychology world today. These debates have been studied and reviewed for many years, with only hypotheses formed, no clear conclusions have been met. In the middle of the debates is human behavior, whether they are learned or inherited remains unanswered. Intelligence, ability, or even personality remains under scrutiny whether these traits are learned or predetermined by specific genes. Physical characteristics can be contributed to hereditary, i.e. eye color or hair color.
When referring to nature, it is assumed that what and who we are, as humans, comes in a natural state or inherited. In other words, we are going to be who we are without the influence on how we were raised and matured in our environment. On the other hand, nurture is viewed as what or who we are as a result of our influences and our environment or surroundings. Homosexuality is one of the hottest topics today. One of the reasons for the popularity is the current debate on same sex marriage, along with homosexual human rights campaigns going on in today’s public arena. More so either this “behavior” is by choice or predetermined by genes.

The Studies
One of the best research in this area is on identical twins. Howard Gruber, the director of the Institute for Cognitive Studies at Rutgers University in Newark, reviewed and quoted two books written by Susan L. Farber, “Identical Twins Reared Apart, A Reanalysis ” and Niels Juel-Nielsen, “Individual and Environment, Monozygotic Twins Reared Apart (Gruber, 1981).
He explained that the importance of the study of identical twins is that they have the same genes. If reared together, they would have the identical conditions their similarities could be either environment or genes. If reared apart they would still have the same genes but their environment would be different. Any differences they would have would be contributed to their environment in which they were raised, with similarities are associated with their identical genes. This was the logic behind Niels Juel-Nielsen study in Denmark on “Danish identical twins reared apart” (Gruber, 1981).
Susan Farber goes further in depth on identical twins reared apart. Howard Gruber cites that Dr. Farber conducted a study on the I.Q. tests on identical twins. That if identical twin’s different environment would not affect their differences in behavior, if they are truly identical. The identical twins that are not separated would be different in some degree. Dr. Farber also discovered that more separation of the identical twins the more differences they had in their I.Q. Conclusion is that if intelligence is gene related or inherited, the separated identical twins would have the same I.Q., but they did not.
Dr. Farber interprets a portion of the study of twins that are raised together often have more differences in their personality and character than twins raised apart. She contributes this to an unusual “micro-environments” that are created for each child when reared together; a process referred as “twinning”. She also found that twins that are reared together would handle their identity issues by emphasizing on their similarities or even taming or redefining their differences. Twins that are raised apart with the knowledge of having a twin, she found they would find and even highlight their similarities. Numerous constituents on heredity and their environment play a role in the total formation. Environment is not something that is given to or taken away from a person; it is what a person can choose and construct for him or herself (Gruber, 1981).
In recent years, many researchers believe that there is a possibility of a “gay gene.” Most gays and lesbians now believe being homosexual, or their sexual orientation, is a born trait and is developed at an early age. Opponents of gay rights believe that homosexuality is a behavior that is a conscience choice, a choice that can be changed or developed.
In 1993, Dean Hamer, a scientist from the National Cancer Institute, reported that he and his colleagues found a maternal link on the Xq28 of the X chromosome. They had tested 40 pairs of homosexual brothers and found 33 of them had this connection. With these results, the linkage of the Xq28, he then reported that he was “99.5% certainty that there is a gene, or genes, in the area of the X chromosome that predisposes a male to become a heterosexual”. During this time, the media took off with this study about the “gay gene”, articles after articles. One article expressed that if they have identified the “gay gene”, expecting parents could possibly one day prevent themselves from having “gay” babies by either altering the fetus’s genes or even just aborting them to prevent giving birth to a “gay” child. By 1995,, his research and hypotheses on the “gay gene” could not be duplicated; therefore, his work was discredited, and his findings retracted (Pierce, 2003).
In 1998, Quebec had an ice storm that caused severe stress upon expecting mothers. A study was produced involving 250 women at 17 weeks gestation. A stress hormone cortisol was found to be elevated in their amniotic fluid. The placenta protects the fetuses from cortisol by producing an enzyme, but it is known to be less effective if the mother is experiencing stress. Stress during pregnancy can have a negative effect on the brain of the unborn child. It can place them in a higher risk for anxiety, Attention Deficit Hyperactivity Disorder and depression. Researchers found that these baby’s mental developmental index, at 18 months, were significantly lower than the average baby at this same age (Bielski, 2012).
These studies are inconclusive; neither study can support whether biological factors or the environmental factors play a single role in the developmental process in determining homosexuality. Biological or nature has many variables including maternal factors, what the mother goes through during pregnancy, and her chemical reactions to her environment which studies have suggested. Would this be environmental or biological? The conditions caused the biological factor, but the biological is what affected the unborn child. Environmental factors also have many variables in the life of an individual. Whether it’s a choice by the parents of the child or as the child grows into adulthood a choice of their own, no two lives are exposed to the same.
In conclusion, these studies will continue to debate the questions on our biological factors and the environment we live in as to our sexuality, what influences us, and who we are. Dean Hamer’s study was strictly focused on their genes. Which in the end could not be reproduced. Dr. Farber’s study was based on the environmental side, since her study was on identical twins it is assumed they all were identical the same as far as their genes.

References
Bielski, Z. (2012, August 23). Stress during pregnancy may lower baby's IQ. Retrieved December 08, 2013, from The Globe and Mail: http://www.theglobeandmail.com/life/parenting/stress-during-pregnancy-may-lower-babys-iq/article597123/
Gruber, H. E. (1981, March 01). NATURE VS. NURTURE: A NATURAL EXPERIMENT. Retrieved December 08, 2013, from New York Times: http://www.nytimes.com/1981/03/01/books/nature-vs-nurture-a-natural-experiment.html
Pierce, D. (2003). The Gay Gene: Assertions, Retractions, and Controversy. Retrieved December 08, 2013, from Davidson College: http://www.bio.davidson.edu/genomics/2002/Pierce/gaygene.htm

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