John-
In my understanding, this doesn't appear to be a co-dominant trait. In co-dominance, the phenotype of both alleles are expressed in the heterozygote. I do not have a great understanding of the striped catenifer, but if it were to be codominant, you would expect to see three different phenotypes for the striped gene. This is because neither allele is dominant over the other and heterozygotes show both phenotypes. If wildtype is represented by the letter A and striped is represented by the letter B, than you would see a banded animal for AA, the heterozygous (AB) animals would have another phenotype, and the BB homozygous dominant animals would be striped (ex. normal, matrix, and ivory blood pythons). As far as I know, the striped catenifer do not have this phenotypically different heterozygous condition (AB). I would think that this inheritance would be more similar to complete dominance. If you have any more information on the striped gene, let me know and maybe I can try to explain the possibilities better.


Ian

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