Nature vs. Nurture Essay

1987 Words May 15th, 2011 8 Pages
Keith Mierzejewski
Methods of Critical Thinking
Research Paper
December 11, 2010
Nature vs. Nurture One of the most enduring debates in the field of psychology is the controversial idea of nature vs. nurture. Throughout the endless history of the debate, no clear conclusion has been met, only hypotheses have been formed. At the center of the debate, human behaviors, ideas, and feelings are being determined, whether they are learned or inherited. Determining physical traits, such as eye color or hair color, are simple because they are hereditary traits. The idea of having a certain personality, intelligence, or ability is under discussion because scientists cannot determine if these traits are learned, or predetermined by genes.
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If identical twins were truly identical, then their development in two different environments would not affect their behavioral differences. Identical twins that are not separated may still differ from each other. Dr. Farber conducted a study that measured the degree of being separated and I.Q. test scores. On average, Dr. Farber discovered that the more separated the twins were, the greater the difference between their I.Q. scores. If intelligence had been hereditary, then these identical twins that were reared apart and separated would still have the same amount of intelligence; yet, they do not (Gruber).
When determining whether homosexuality is caused by an individual’s environment and surroundings or by genetics, the answer is unknown. To this day, researchers are still pondering whether or not this “gay gene” exists. Most gays and lesbians believe their sexual orientation is an inborn trait or developed in earlier years of life. However, opponents of gay rights believe homosexuality is a behavior that is created through the conscience thought, and this behavior can be changed or developed at will. In 1993, a study was done Dean Hamer, a scientist from the National Cancer Institute. He reported that he had linked male homosexuality to a small region, specifically the end, of one human chromosome: the x-shaped chromosome. Thirty-three of forty pairs of gay brothers were found to have this identical piece of
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