GENETICS AND EPIGENETICS
Epigenetics: Beyond DNA Sequences Epigenetics explores how environmental factors and lifestyle choices influence gene expression without altering the DNA sequence itself. Mechanisms : DNA methylation and histone modification act like “switches” that turn genes on or off. Applications : Understanding cancer development, aging, and how stress or diet can affect health. Key Idea : Genes are not destiny—environment and behavior play a powerful role in shaping outcomes. Genetic Engineering: Designing Life Genetic engineering is the direct manipulation of DNA to alter traits in organisms. Techniques : Recombinant DNA technology, CRISPR-Cas9 editing. Applications : Medicine : Gene therapy, production of insulin and vaccines. Agriculture : Pest-resistant crops, enhanced nutrition. Industry : Enzymes for biofuels and food processing. Ethical Debate : Balancing innovation with concerns about safety, biodiversity, and human enhancement.