The Piebald mutation is one of the most spectacular. This mutation is characterized by an alternation of pure white colour and aberrant pattern. The quantity of white is variable from an animal to the other and does not depend on relatives. Two pythons possessing only 10 % of white can give birth to a 90% white young.

Some definitions of genetics...

Allele : alleles are the different versions of the same gene
Dominant allele : an allele is said to be dominant if he is able to pass alone a characteristic trait of the parents to the descendants.
Recessive allele : an allele is said to be recessive if he is not able to pass alone a characteristic trait of the parents to the descendants.
Co-dominant allele : alleles are said to be co-dominant when together they are able to pass a characteristic trait to the descendants.
Homozygous : An individual is said to be homozygous for a given gene if he possesses two identical alleles of this gene.
Heterozygous : An individual is said to be heterozygous for a given gene if he carries two different alleles.

Piebald gene is recessive.

male	female	descendants
Piebald	Piebald	100% of the descendants are Piebald
Piebald	normal	100% of the descendants are heterozygous Piebald (het Piebald)
Piebald	het Piebald	50% of the descendants are Piebald 50% of the descendants are heterozygous Piebald (het Piebald)
het Piebald	het Piebald	25% of the descendants are Piebald 50% of the descendants are het Piebald 25% of the descendants are normal NB : Normal and Het Piebald are not distinguishable. In this case, normal looking youngs are said to be "66% possible Het Piebald"
het Piebald	normal	50% of the descendants are het Piebald 50% of the descendants are normal NB : Normal and Het Piebald are not distinguishable. In this case, normal looking youngs are said to be "50% possible Het Piebald"

Few possible combinations :
Piebald x Albinos (Dream Circle)
Piebald x Axanthic
Piebald x Spider
Piebald x Ghost
Piebald x Pastel