Asymmetric Spindle (image) University of Pennsylvania Share Print E-Mail Caption Signals from the polarized cell cortex (in green) in mouse oocytes regulate microtubule tyrosination (white) to generate spindle asymmetry in meiosis I. This asymmetry can be exploited by selfish genetic elements to bias their transmission to the egg as a form of meiotic drive. Credit University of Pennsylvania Usage Restrictions In context of reporting 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.