EXPLORE THE RI ADVENT CALENDAR: http://rigb.org/advent Geneticist Aoife Mclysaght introduces the Ri advent calendar 2013 - our video journey through the human genome. Each day in December we'll release a new short film focussing on the 23 pairs of human chromosomes and the mitochondrial DNA that make up the building blocks of human life. Starting with the largest human chromosome - chromosome 1 - Aoife explores how genes are organised and how genetic information is passed from one generation to the next. Don't miss the