What is the term used for inserting a healthy copy of a gene into a person who has a defective gene?

The answer is : gene therapy hope this helps :)

It doesn’t show the symbol

Because the earth is not round ,but it may seem round when viewed from ,our planet but true some points earth is not round was an oblate spheroid -a square that it squashed as globe however is not even a perfect oblate spheroid.in fact isaac newton's first proposed that earth was not perfectly round but it was an oblate spheroid instead.that mean a square that is squashed as its poles and swollen at the