Seems to be co dominant. A friend of mine, Richard Boynton, bred a calico to a calico. Both parents had very pink bellies with quite a lot of white speckling. Half the clutch looked like the parents with the heavy pink bellies and a few looked like this one, with very high white sides, so we are assuming that the more white animals may be the super form.
Time will tell but I am over the moon to have such a cool boa.
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