Which type of testing clarifies genetic status for asymptomatic family members?

Which type of testing clarifies genetic status for asymptomatic family members?

• A. Carrier screening
• B. Predictive value testing
• C. Cytogenetic testing
• D. Pre-implantation genetic diagnosis

Answer: (B)

The testing that clarifies genetic status for asymptomatic family members is carrier screening. This type of testing is designed to identify individuals who carry one copy of a gene mutation that, when present in two copies, can cause a genetic disorder. It is particularly valuable for assessing risk in family members who do not show symptoms of the condition but may still be carriers of genetic mutations, thus allowing for informed reproductive decisions.

Carrier screening helps identify individuals who may pass on inherited conditions to their offspring, making it an essential tool in genetic counseling and family planning. It is often recommended for individuals with a family history of certain genetic disorders or those belonging to specific ethnic groups that have higher carrier rates for certain conditions.