A het. hypo male breed to a normal female will give you 50% het hypos and 50% normals. Here is a good link to see how the recessive gene works:

EDIT:...ha ha... forgot the link...it gives a albino example....which is just the same as hypo

http://www.ballpython.ca/what_get/recessive.html

at the bottom click on co-dominant or dominant and you can see how those types of genes work