The expression of genes is reduced when genes are silenced. Silent genes are found in heterochromatin, which is the region of compactness in chromatin. You can read about Gene-editing (Advantages and Concerns) – UPSC Notes (GS III) in the given link.
- Genetic Engineering – Meaning, Applications, Advantages and Challenges [UPSC Notes]
- Topic-Wise GS 3 Questions for UPSC Mains