There is a footer on the homepage. If you look at the demo, there are 3 Footer Widgets at the bottom, and right below that is the “Footer“. To activate the 3 Footer widgets, you have to at least have something inside of the first Footer Widget area or it won’t show anything. This is the way the Genesis Framework is built.
If you need to customize the footer (at the very bottom) you’ll need to do this from your functions file. Take a look here for the code snippet – http://my.studiopress.com/snippets/footer/