Chapter C, Problem 9P

C.9 Go to the website http $\text{://}$ www $\text{.}$ cancer $\text{.}$ gov and scroll down to the box labeled “Find a Cancer Type.” Select “B” and then select “Breast Cancer.” Scroll down to “Causes and Prevention” and then select “BRCA $1$” and BRCA $2$: Cancer Risk and Genetic Testing.” Use this information on this page to answer the following questions.

What are the approximate percentage increases in risk of having breast cancer and of having ovarian cancer for women inheriting harmful mutations of BRCA $1$ and BRCA $2$ compared with the risk in the general population?

What features of family history increase the childhood that a woman will have a harmful mutation of BRCA $1$ orBRCA $2$?

With regard to the results of genetic testing for BRCA $1$ and BRCA $2$ mutations, what is meant by a “positive result”

Are there measures a woman with a positive result can take to lessen her chances of developing cancer or to catch a cancer early in its development?

As a special project, instead of selecting “Breast Cancer” form the list types of cancer select another cancer you would like to know more about and produce a short summary of what you find.