A type of treatment useful in correcting single-gene disorders is __________.

• A. amniocentesis
• B. carrier recognition
• C. chorionic villi sampling
• D. gene therapy

Answer: (D)

Verified step by step guidance

1. Understand the context of the problem: The question is about treatments for single-gene disorders, which are genetic conditions caused by mutations in a single gene.
2. Identify the options provided: The options listed are amniocentesis, carrier recognition, chorionic villi sampling, and gene therapy.
3. Clarify each option: Amniocentesis and chorionic villi sampling are diagnostic procedures used to detect genetic abnormalities in a fetus, not treatments. Carrier recognition is a method to identify individuals who carry a gene for a genetic disorder, not a treatment.
4. Explain gene therapy: Gene therapy is a technique that involves altering the genes inside a person's cells to treat or stop disease. It is specifically designed to correct or replace faulty genes responsible for disease development.
5. Conclude the reasoning: Based on the explanations, gene therapy is the only option that serves as a treatment for single-gene disorders, as it directly addresses the genetic cause of the disorder.