It's Possible For a Person to Have Two Different Sets of DNA - Here's How It Happens
Human chimeras are more common than you might expect. In Greek mythology, a chimera was a fire-breathing creature with physical traits of a lion, goat, and dragon. In human beings, a chimera is a person who has two totally different sets of DNA inside their body. It’s a bit less dramatic than a fire-breathing monster, sure, but it’s still pretty wild. Even wilder: Human chimeras aren’t the result of futuristic genetic tinkering. They can occur naturally, and some people don’t even know that they’ve doubled up on DNA. Here’s a quick guide to the ways a person can become a human chimera. It can happen after a bone marrow transplant Bone marrow is the tissue inside our bones that’s responsible for making white blood cells, red blood cells, and platelets. In bone marrow transplants, doctor uses chemotherapy or radiation to destroy all the recipient’s diseased bone marrow, then a donor’s healthy marrow is put in its place. The donor’s bone marrow will keep on making blood cells that hav