Size Matters (IMAGE) University of Pennsylvania School of Medicine Caption Awakening of the zygote genome over time as decreasing individual cell size triggers early embryo transcription. Credit Hui Chen, Penn Medicine; Cell Press Usage Restrictions None 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.