60-year-old female is recently diagnosed with colon cancer and is aware of the familial risk factors related to bowel caner. She refuses to inform her siblings (who are at risk) of her situation. How...

60-year-old female is recently diagnosed with colon cancer and is aware of the familial risk factors related to bowel caner. She refuses to inform her siblings (who are at risk) of her situation. How could the nurse approach this situation?

Which of the following conditions of heredity are considered to be unifactorial?

1. Sickle cell disease

2. Cri-du-chat syndrome

3. Down syndrome

4. Achondroplasia (dwarfism)

5. Neural tube defects