Advancements in Gene Editing

Using CRISPR-Cas9, genetic changes can be introduced into germline cells (sperm/egg) (Statement 1 is correct). Genome editing at the early embryonic stage is scientifically possible and has been demonstrated experimentally (Statement 2 is correct). Scientists have successfully injected human induced pluripotent stem cells into animal embryos (like pigs) to create human-animal chimeras, aiming to grow human organs for transplant (Statement 3 is correct). > One-line conceptual takeaway: Advanced biotechnological tools like CRISPR and stem-cell therapies have made both germline editing and inter-species chimeras scientifically feasible. Answer: (d).