Embryonic Central Nervous System Defects (IMAGE) Carnegie Institution for Science Caption This image shows an example of defects in the development of the embryonic central nervous system in stored eggs that lacked the Fmr1 gene -- stored being the key word, since un-stored eggs showed normal development. Analogous to the spinal cord, the ladder-like ventral nerve cords on the right are from stored eggs lacking in Fmr1. The image on the left is a normal ventral nerve cord with functioning Fmr1. Credit Courtesy of Ethan Greenblatt and Allan Spradling. 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.