91Ó°ÊÓ

Answer: An example of a CRISPR-Cas9 application in biotechnology is the development of disease-resistant crops. The steps involved in this application include: 1. Understanding CRISPR-Cas9 Technology: CRISPR-Cas9 is a gene-editing technology allowing precise gene editing within organisms. 2. Identifying the Target Gene and Designing Guide RNA: Scientists identify a target gene within the plant's genome that provides susceptibility to the disease and design a guide RNA (gRNA) that binds to the target gene. 3. Introducing CRISPR-Cas9 and the Guide RNA into Plant Cells: Using methods like Agrobacterium-mediated transformation or electroporation, scientists introduce the Cas9 enzyme and gRNA into plant cells. 4. Gene Editing and Plant Regeneration: Inside the plant cells, the gRNA binds to the target gene, the Cas9 enzyme creates a double-strand break, and the plant's DNA repair mechanisms modify the gene. Researchers then regenerate whole plants from the edited cells using plant tissue culture techniques. 5. Evaluating the Edited Plants for Disease Resistance: Researchers expose the edited plants to the disease-causing agent and monitor them for disease symptoms. Successful editing results in increased disease resistance, leading to healthier crops and more consistent food production.