According to the text, gene therapy currently includes all of the following methods EXCEPT:
A. replacing one sequence with another at the same locus via recombination.
B. inserting a sequence into a coding region of DNA.
C. altering the regulatory portions of a locus such that the alleles at the locus are turned on or off differently.
D. replacing one sequence with another at the same locus via induced mutation.
Answer: B
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