Other tests use direct DNA testing, which involves a direct examination of the relevant gene in a search for mutations in that gene. Only individuals at risk are tested by this method. However, these diseases are currently untreatable, and individuals at risk may decide that they would rather not know if they or other family members are destined to suffer through the mental and physical deterioration these diseases cause. In addition, people with these types of degenerative diseases may be denied insurance, have difficulties obtaining employment, and are ineligible to adopt children. Comparison of the inheritance pattern of recessive and dominant disorders in a family.
Instructions Divide the class into groups of four to six.
Explain that each student should choose one of the roles listed at the top of the case study handout. Ask the students to read carefully through the scenarios on the handout. Have them answer the question beneath each scenario based on how they think that person would respond. If time permits, have students choose another role and discuss the consequences of the scenarios from the new viewpoint. Extensions Have students contact local hospitals and public health facilities to create a list of local genetic counseling resources.