Genetics up Close (IMAGE) University of Utah Health Caption Many cells in the brain express two copies of each gene, one inherited from mom and one from dad. Others express just one copy. If the single copy happens to carry a genetic mutation, it may cause the cell to become sick. The discovery from the University of Utah offers a previously undescribed nuanced view of genetics that has consequences at the cellular level. Credit Christopher Gregg Usage Restrictions With credit License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.