http://www.almotamar.net صحيفة إلكترونية يومية تصدر عن حزب المؤتمر الشعبي العام (اليمن) http://www.almotamar.net/1359.htm 2006-10-29 Our genes, inherited from our parents, are essentially fixed for life. But new evidence suggests that a number of factors—such as the environment in the womb—can change a child’s long-term health prospects by determining which genes turn on and which stay silent.