Here's a good site to look at the different morphs and combos:
http://www.worldofballpythons.com/morphs/
This can calculate different genetic combos for you:
http://www.worldofballpythons.com/wizard/
Some breeding basics:
http://www.ballpython.ca/gallery/breeding.html
And if you don't know how to calculate recessive genes percentages, this will help:
http://www.newenglandreptile.com/gen...recessive.html