Human Chimeras
In 1953 a human chimera was reported in the British Medical Journal. A woman was found to have blood containing two different blood types. Apparently this resulted from cells from her twin brother living in her body. More recently, a study found that such blood group chimerism is not rare. Another report of a human chimera was published in 1998, where a male human had some partially developed female organs due to chimerism. He was conceived by in-vitro fertilization. In 2002, Lydia Fairchild was denied public assistance when DNA evidence showed that she was not related to her children. After hearing of a human chimera in New England, Karen Keegan, it was eventually found that she too was a chimera and thus had two sets of DNA.
Read more about this topic: Chimera (genetics)
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