MTEL Health/Family and Consumer Sciences

Correct Response: A. Hemophilia and sickle-cell disease are both inherited blood disorders caused by gene mutations. Therefore, these two diseases would best illustrate the relationship between genetic factors and the development of disease. Although aging (B), lifestyle behaviors (C), and environmental factors (D) can affect how diseases progress, neither hemophilia nor sickle-cell will develop without the underlying genetic mutations, so they are not the best answer.