Which of the following conditions is the least likely to be treated with gene therapy in the future?
A) hemophilia, in which a genetic mutation prevents the production of a clotting protein
B) a digestive system disorder in which a protein is not expressed that is necessary for the absorption of a nutrient
C) a neurodegenerative disease in which males inherit a mutated gene from their mothers
D) Turner syndrome, in which only one copy of the X chromosome is present instead of the usual two X chromosomes

Question

Quizplus · Accepted Answer

Turner syndrome is caused by a missing or incomplete X chromosome, which cannot be replaced by gene therapy. Gene therapy involves adding or correcting genes, not adding an entire missing chromosome. Hemophilia, digestive system disorders, and neurodegenerative diseases can potentially be treated with gene therapy by introducing a working gene or repairing a defective gene.

Which of the Following Conditions Is the Least Likely to Be