1. As a result of your discussions, you know that mutations in BRCA1 and BRCA2 increase the risk of breast cancer. Because of this, a positive test for these mutations would mean different treatment for Ann, including removal of both her breasts (bilateral mastectomy) as well as her ovaries to prevent ovarian cancer. Ann decides to have the test done, but she is a little hazy on the biology of DNA.
a. Describe the basic structure and function of a gene.