Australian Cinnamon is an allele of the Sex-Linked Ino.
To me this means that the Australian Cinnamon gene and the Ino gene are found about the same area on the chromosomes, so you can have either two Australian Cinnamon genes in the same location of the chromosome (which will give us an Australian Cinnamon bird), or two Ino genes on the same location of the chromosome (which would give us an Ino bird), or one Australian Cinnamon and one Ino, which we call the Splitcinnamonino. Because they are located so close on the chromosome strain we can not get the crossing over, like we can in the American Cinnamon, Ino, and Opaline genes because they are too close to be able to jump over to the other chromosome.
You can have a bird that is split to Ino, or split to Australian Cinnamon, but never have a bird that is split to both of these colors at the same time because if they carry both of the genes then it will be visual.
Of course since they are sex linked you would never have a hen that is split to either one.
