Genetically reduced amounts of melanin is referred to as hypomelanism. These pythons are able to produce tyrosine ( dark pigments).
Hypomelanistic carpet pythons display a marked decrease in black markings. There seems to be different schools of thought when it comes to the heritability of this trait. There are those who believe that it could be polygenic in nature and those who argue that it could be incomplete dominant in origin.
We believe that there are multiple strains and modes of inheritance at work, depending on the origin of the animals.