The XYY Chromosomal Factor

Paper Summary:

This paper discusses how the XYY syndrome has been blamed for many abnormalities in human males for well over one hundred years and how recent evidence points to the fact that this syndrome does not
manifest aggressive or violent behavior in affected human males, at least not to the extent of criminality or sociopathological behavior, such as one would find in sociopaths or "serial killers." It concludes that since genetic research on this abnormality is rather scant, we must rely on what is available, based on hard scientific evidence and documentation and that under extraordinary circumstances, this type of genetic disorder may indeed cause some type of aggressive behavior in males, due to the existence of higher levels of testosterone.

From the Paper:

"This 47, XYY Syndrome is rather common as compared to other genetic abnormalities associated with human chromosomes and how they pair up during the development stages of human growth in the womb. Overall, this syndrome occurs in about 1 male out of 1,000, "born with an extra Y chromosome in each cell." In the United States, recent data has revealed that 5 to 10 boys are born each day with the 47, XYY Syndrome which figures to less than one percent ("What is 47, XYY Syndrome?" Internet). These statistics tend to show that the XYY Syndrome is rare, yet when one considers the number of males born in the U.S. every day with other genetic disorders, it could be said that this syndrome is relatively common. "

Sample of Sources Used:

• Czepulkowski, J. Analyzing Chromosomes. New York: Routledge, 2000.
• Lloyd, J.R. Genes and Chromosomes. New York: Palgrave-Macmillan, 1986.
• Moore, David S. The Dependent Gene: The Fallacy of Nature vs. Nurture. New York: Henry Holt & Company, 2001.
• O'Neil, Dennis. "Male Sex Chromosome Abnormalities." Internet. 2005. Retrieved from http://anthro.palomar.edu/abnormal/abnormal_5.htm.
• Valentine, G.H. Chromosomes and Their Disorders. San Diego: Elsevier Science and Technology Books, Inc., 1996.

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