Genes from Mom Prevent Defect (image) Princeton University Share Print E-Mail Caption Compared to a normal zebrafish embryo (right), an embryo lacking gdf3 (left) inherited from mom shows major defects resulting from its inability to form mesoderm and endoderm cells early in development. Credit Pelliccia et al., 2017. Usage Restrictions Pelliccia et al., 2017. Share Print E-Mail 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.