Epigenetic modifications change the likelihood of gene expression, anšíček, Joe Godenzi, John C. Vesey, Kellas Lowery, L S, Lasse T. Stendan, Matt Townsend, Michael Morrissey, Michelle J. Zamaroon, Osian Gwyn Williams, Paul Brown, Rebecca Pan, Robert Hillier, Robert Reinecke, and Roger Baker. --- The Ri is on Patreon: https://www.patreon.com/TheRoyalInstitution and 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-policy Subscribe for the latest science videos: http://bit.ly/RiNewsletter Product links on this page are affiliate links which means it won't cost you any extra but we may earn a small commission if you decide to purchase through the link.