1. Compare the role of tumor suppressor genes to proto-oncogenes. 2. What are HeLa cells and why are they important? 3. What is the relationship between carcinogens and mutations? How does this in turn affect the development of cancer? 4. Identify the parts on the picture at the top. [ DNA, Chromosome, Tumor Suppressor, Proto-Oncogene, Cell ] 5. In 1951, cells were taken from Henrietta Lacks and used for many years in research. Henrietta did not give permission for her cells to be used, the law did not require that. These cells have been used in over 60,000 research projects, but Henrietta's family has not received any compensation for contribution to the research. Do you think the law should be changed? Should people be compensated for donating their cells to science?