Gene therapy

a. has not yet been used successfully with
mammals.
b. is a surgical technique that replaces
defective genes with normal genes.
c. has been used successfully to treat victims
of autosomal dominant disorders by
replacing the dominant allele with a
recessive allele.
d. is a genetic engineering technique that
replaces defective alleles with normal ones.
e. is none of these.


D

Biology & Microbiology

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