Genetically modified human embryos: Chinese scientists raise concerns after editing embryo DNA

Scientists worldwide have renewed calls for a halt to controversial human embryo research after a team of Chinese scientists published a paper on the genetic editing of human embryos. Researchers at Sun Yat-sen University in Guangzhou, China hoped to modify a gene in chromosome 11 responsible for beta-thalassemia, a genetic mutation that reduces the production of hemoglobin and results in lack of oxygen in the body. The embryos used in the research each had 69 chromosomes after being fertilized by two sp