The diagram shows the process used in gene therapy. At this location, which label belongs in the area marked X?

normal allele
mutated gene
copied allele
inserted gene

a normal allele

Explanation:

okay so i just wanted to know if anyone actually reads the paragraph explanations or not so this is my test if you red this comment "cow" if no then well don't but yeah all I'm really just doing this as experiment so if you are still reading say (cow as I said before) but that's really it the answer is correct but still

c.more precipitation,but only when emission levels.

that is true   : ) hope this you