Why You Might Have Someone Else's DNA

Because of twin death early in pregnancy, many people carry the DNA of two people. Could you be a chimera?

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How can a man who fathered a child also not be that child’s father? Nope, there’sno secret funny business with the neighbour involved. Just Chimerism.Hey guys! Amy with you on DNews today digging into the totally fascinating world of chimerism!In Greek mythology, Chimera is a fire-breathing monster with the head of a lion, the bodyof a goat, and the tail of a snake. It is, in short, something that blends multiple speciesand thus can’t possibly exist in reality.Except that chimeras do exist. Scientifically speaking, a chimera is someone with have multiplesets of DNA. But if each individual has their unique DNA signature, then a chimera is…two people… rolled into one? Actually, that’s kind of what’s happening.It happens when an embryo takes in its twin’s cells -- and therefore genetic material — inutero.Twins ha...