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As can be seen on the graph, there is not a testosterone concentration that can reliably divide females from males as there were still female outliers in the data that had higher testosterone concentration than others. Answer the following questions using the table of DSDs:5.By what mechanism can a mutation in CYP21A2 change testosterone levels? Individuals produce excess testosterone 6.What changes in phenotype are typical in people with a CYP21A2 mutation? Enlarged clitoris, short vaginal canal, elevated testosterone levels, decreased fertility7.What is the effect of a nonfunctional SRY gene on the development of primary sex characteristics? If a SRY gene is nonfunctional, the gonads do not turn into testes. 8.Which sex is typically assigned at birth to an individual with a mutation that results in a nonfunctional SRY gene? Individuals are usually assigned as female at birth. 9.How can an error in chromosome segregation result in Turner syndrome? An error in chromosome segregation results in just one complete X chromosome as the other is completely or partially lost. CASE STUDIESClick the “Case Studies” tab, read about the two athletes and the history of sex verification tests, and then use the information to answer questions 10-12. Click the "Sprinter" tab.10. Which four tests have historically been performed to determine an athlete’s biological sex?