Both genes and environmental factors contribute to cancer. Prostate cancer is 39 times more common among people from Utah than among people from Shanghai. Briefly outline how you might determine whether these differences in the incidence of prostate cancer are due to differences in the genetic makeup of the two populations or to differences in their environments.

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Q: Part A What is the probability that the first son of a woman whose brother has Lesch-Nyhan syndrome…

A: Lesch Nyhan syndrome is X linked recessive disorder. Normal = XX, XXn, XY Affected = XnXn, XnY

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