http://www.vmsherp.com/LearningCenter.htm

http://www.ralphdavisreptiles.com/matrix/

The two above links, if read and reread carefully, should give you everything you need to know about genetic traits, which is the first step to understanding what you are trying to figure out. Then you need to learn which traits for Boas or BPs are co-dom and which are recessive.

Boas:
Co-Dom traits:
pastel
salmon
hypo
jungle
motley

recessive traits:
anery
albino
squaretail
stripe

After this you will get into DH and Co-dom/recessives Double traits and triple hets and so forth.