ARMS 0 Posted April 16, 2007 Scientists have revealed details of the world's only known case of "semi-identical" twins The journal Nature says the twins are identical on their mother's side, but share only half their genes on their father's side. I once read that women are chimera's, often they are made up of more than 1 genome from their ancestors, for example their mothers cells and their cells (the same for men), but women have multiple genomes in their make up, therefore suffer more autoimmune disorders.. Share this post Link to post Share on other sites