|Cornsnake Morph Guide ®||Pattern Formation||Charles Pritzel|
The next group moves approximately halfway down the sides and forms the main side blotches.
The third group moves to the edges of the belly scales and forms the lower side blotches.
The last group migrates all the way to the belly and creates the dark checkers on the scutes.
The cells that control ground color spread out into the remaining areas, and tend to be most concentrated between the saddles.
If anything slows the process of this downward migration, the first thing to be noticed will be an absence of pattern at the center of the belly. This is also seen as a "white stripe" on the center of the belly. Several cornsnake mutants affect the belly pattern this way.