Which of the following is a genetic test option for cystic fibrosis?

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Multiple Choice

Which of the following is a genetic test option for cystic fibrosis?

Genetic testing for CFTR mutations directly looks for changes in the CFTR gene that cause cystic fibrosis. Since CF is due to mutations in this gene, identifying the specific mutations confirms the diagnosis, clarifies carrier status, or supports prenatal testing. Newborn screening by IRT is a biochemical screening that may lead to follow-up genetic testing but is not itself a genetic test. The sweat chloride test measures the amount of chloride in sweat to diagnose CF based on a physiological response, not a gene change. Chest X-ray is an imaging test that shows lung structure, not genetic information.

Genetic testing for CFTR mutations directly looks for changes in the CFTR gene that cause cystic fibrosis. Since CF is due to mutations in this gene, identifying the specific mutations confirms the diagnosis, clarifies carrier status, or supports prenatal testing.

Newborn screening by IRT is a biochemical screening that may lead to follow-up genetic testing but is not itself a genetic test. The sweat chloride test measures the amount of chloride in sweat to diagnose CF based on a physiological response, not a gene change. Chest X-ray is an imaging test that shows lung structure, not genetic information.

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