If everyone has different DNA, how can a defective gene from one person be replaced by a correct gene from another person?

What conclusions can be drawn from the limited success to date of gene replacement therapy?

Now that the mapping of the human genome has been completed, what is next?

” Genetic engineering will be the scalpel of the future” COMMENT on this,

Give four examples of how genetic engineering specifically impacts your life

All these questions need to be answered in 1 paragraph each. Each question needs ONE source for your answer. Plagiarism tools are used.