Fly embryo development (VIDEO) Princeton University This video is under embargo. Please login to access this video. To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Caption Visualization of the Hox gene Scr transcription in a live embryo. Nuclei are shown in blue (tagged histone), and transcription foci appear in white. Transcription can be detected just prior to the onset of gastrulation – the complex set of tissue movements that is observed towards the end of the movie. Credit Philippe Batut, Princeton University Usage Restrictions None. License Original 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.