I'll try to sum it up best I can and make it brief:



Regular Axanthic: (SK, Joliff, and VPI lines, maybe more out there that have been proven)



Simple recessive genetics, homozygous animals are lacking in yellow pigments, meaning the animal appears especially when young to be black,grey, and white only.



Red Axanthic: (Corey Woods line only proven genetic as far as I know, RDR reptiles working with line as well)



Incomplete Co-Dominant, heterozygous animals show a difference from wild type although they still retain amounts of yellow pigment, most show black backing to some degree, homozygous animals lack yellow, but still retain amounts of red, making them appear different that a regular type axanthic. Homozygous animals also all have black back appearance.



Cinnamon/Black Pastels: (many bloodlines available, to many to keep track of)



Incomplete Co-Dominant, Heterozygous animals show same characteristic heads, varying amounts of red/yellow/black pigments, all have the same brown faded colored head. Homozygous animals range from a "black" animal to a "cinnamon" colored animal. These animals are not lacking in yellow pigment at all as a true axanthic is. Rather they are somewhat more along the lines of hypermelanism, an increase in the amount of black present in the animal.



There is also a pattern mutation inherent in them, or rather I should say lack of pattern. The difference between the black and cinnamon lines ( this is only my personal opinion as the breedings to prove this have not been done extensively yet) is not in the gene affecting the melanin in the animal, but in a seperate gene controlling the amount of yellow in the animal (black = less yellow, cinnamon = normal amount of yellow)



Well, it ended up longer than I expected, hope this helps.



Dan

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