Ancient Gene Revives to Create Living Mouse from Pre-Animal Era

Scientists have created a mouse using ancient genes from single-celled organisms, challenging previous beliefs about the evolution of stem cells. By introducing choanoflagellate genes into mouse cells, researchers generated induced pluripotent stem cells, which contributed to the development of a chimera mouse. This discovery suggests that key genes involved in stem cell formation may have originated long before multicellular life, offering new insights for regenerative medicine.