Speaker: Antonio Giraldez, Yale University, Title: "Deciphering the Regulatory  Codes Shaping the Maternal to Zygotic Transition During Development". Hosted by Terry Orr Weaver. The Biology Colloquium is a weekly seminar held throughout the academic year, featuring distinguished speakers in many areas of the biological sciences, from universities and institutions worldwide. More information on speakers, their affiliations, and titles of their talks will be added as available. The Colloquium takes place at the Stata Center's Kirsch Auditorium, 32-123, at 4:00PM on most Tuesdays during the school year. Contact: Linda Earle lkn@mit.edu