"SRY - Sex Determining Region Y - Genetics Home Reference." Genetics Home Reference - Your Guide to Understanding Genetic Conditions. Web. 11 Oct. 2011. <http://ghr.nlm.nih.gov/gene/SRY>
"Turner Syndrome - PubMed Health." Web. 10 Oct. 2011. <http://www.ncbi.nlm.nih.gov/pubmedhealth/PMH0001417/>.
"Klinefelter Syndrome - PubMed Health." Web. 11 Oct. 2011. <http://www.ncbi.nlm.nih.gov/pubmedhealth/PMH0001420/>.
"Sex Chromosome Abnormalities." Biology. Web. 12 Oct. 2011. <http://biology.about.com/od/basicgenetics/a/aa110504a.htm>.
"Sex Selection." Wikipedia, the Free Encyclopedia. Web. 12 Oct. 2011. <http://en.wikipedia.org/wiki/Sex_selection>.
Our interview with Professor Jenny Graves was our main resources for information