What are off-target effects in genome editing and why are they a concern?

What are off-target effects in genome editing and why are they a concern?

• A. Unintended edits at similar sequences; could disrupt other genes; safety concerns
• B. They increase on-target efficiency
• C. They improve specificity
• D. They are irrelevant

Answer: (A)

Off-target effects are unintended edits at sites other than the intended target. In genome editing, the editing tool is guided to a specific DNA sequence, but sequences that look similar can also be cut or modified. These accidental changes can disrupt other genes or regulatory elements, potentially causing unwanted mutations, altering gene function, or affecting genome stability. This is a safety and accuracy concern, especially in therapeutic applications, because even small unintended changes could lead to harmful outcomes. The other options don’t fit because off-target effects do not improve on-target efficiency, do not enhance specificity, and are not irrelevant.

Off-target effects are unintended edits at sites other than the intended target. In genome editing, the editing tool is guided to a specific DNA sequence, but sequences that look similar can also be cut or modified. These accidental changes can disrupt other genes or regulatory elements, potentially causing unwanted mutations, altering gene function, or affecting genome stability. This is a safety and accuracy concern, especially in therapeutic applications, because even small unintended changes could lead to harmful outcomes. The other options don’t fit because off-target effects do not improve on-target efficiency, do not enhance specificity, and are not irrelevant.