Judith Mank leads a tour of how sex is genetically programmed and how sex differences evolve. Watch the Q&A here: https://www.youtube.com/watch?v=v-DRO… Subscribe for regular science videos: http://bit.ly/RiSubscRibe Males and females in many species are often quite different from one another. The sex of an individual can have profound effects on how an organisms behaves, how it looks, how it lives and, in some cases, even how it dies. These differences are the product of different evolutionary forces acting on males and females, sometimes creating substantial conflicts between the sexes. In this talk, Judith Mank gives a quick tour of how sex is genetically programmed and how sex differences evolve. Judith Mank is Professor in the Department of Genetics, Evolution and Environment at University College London. She is interested in understanding how form, behaviour and reproductive patterns have evolved through selective pressures. The Ri is on Twitter: http://twitter.com/ri_science and Facebook: http://www.facebook.com/royalinstitution and Tumblr: http://ri-science.tumblr.com/ Our editorial policy: http://www.rigb.org/home/editorial-po… Subscribe for the latest science videos: http://bit.ly/RiNewsletter