Write an introduction and discussion for a biology lab report about CRISPR-CAS9

introduction should be 1.5-2 pages 

discussion should be 1-1.5 pages 

use and cite sources  

In the introduction be sure to include background information about CRISPR-CAS9 gene editing and the basic steps and why CRISPR-CAS9 gene editing, lacZ gene and blue-white screening

In the discussion include the possible sources of error of CRISPR-CAS9. Also include ways to fix these errors. Also include ways the experiements can be improved as a whole