What testing method assesses specific genetic conditions within families?

• A. Carrier screening
• B. Single-gene disorders
• C. Predictive value testing
• D. Genome-wide association study

Answer: (B)

The correct answer focuses on the specific assessment of genetic conditions within families, which is often associated with the evaluation of single-gene disorders. Single-gene disorders are caused by mutations in a specific gene and can be inherited in a Mendelian fashion. Testing for these disorders often involves looking at a family history to determine risk and can identify individuals who may carry genetic mutations that they could pass on to their offspring. Such testing is essential for understanding the inheritance patterns and guiding family planning and management options.

In contrast, carrier screening is generally broader and focuses on identifying individuals who carry a gene for certain recessive conditions, without necessarily determining if the conditions are present in the family. Predictive value testing is often used to evaluate the likelihood of developing certain diseases based on genetic testing, but it does not specifically assess familial inheritance patterns. Genome-wide association studies examine genetic variations across the genome to identify associations with diseases, rather than focusing on specific genetic conditions within families.