5
Answer: ASet 2: Command of Evidence (Intermediate)
Explanation
PASSAGE
CRISPR-Cas9 is a gene-editing technology that allows scientists to modify DNA sequences with unprecedented precision. While promising for treating genetic diseases, it raises ethical concerns: changes made to 'germline' cells can be inherited by future generations, permanently altering the human gene pool.
Why are germline edits particularly concerning?
A. They are more expensive than other methods.✓ Correct
B. They only affect the individual being treated.
C. They can pass to offspring, affecting future generations.
D. They are completely reversible.
Detailed Explanation
The text states germline changes 'can be inherited by future generations, permanently altering the human gene pool. '
Key Evidence:
• "inherited by future generations"
• "permanently altering"
Why others are wrong: A (Cost is not mentioned as the concern.), B (The opposite; they affect FUTURE generations.), D (The text says 'permanently,' implying irreversibility.).