Zygote (Cell-1 Phase) (IMAGE) Oregon Health & Science University Caption This is a zygote (cell-1 phase). Credit Shawn Chavez, Ph.D. 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.