you'll get fed up with me on here soon !! Heard article on radio regarding new study due to human genome info that women have y and 1 Xtype chromo however, initially women have 2 Xtype chromo but one is 'switched off 'when the sex is determined in the womb. Each chromo carrys a percentage of your genes. they have found that its not always the same x chromo switched off, seems random,in women which is why some 'twins' are not identical. BUT they have found that women with certain problems, ie MS, poss lupus and some related illness ( didn't mention fms specifically )all have the same x chromo with the other switched off !.This apparently can affect how the body fights / repairs cells and allows poss viral infections to go undetected. i know this doesn't mean cures all round, just that they are now looking at which genomes could be responsible and that with luck they can determine if its due to a gene not being ' switched on ' or if it should be ' switched off'. Any one else heard of this, its in the UK.