100% het - means it 100% carries the gene buts its not visual (imagine a wild looking darwin, carrying albino gene) - off spring of an animal showing the gene x with an animal that is 100% carrying the gene but not showing it
66% het - just means out of the clutch there will be animals that are carrying the gene and animals not carrying the gene, as you can't tell which is which (because they both arent SHOWING the gene) its a 66% / 50/50
Hypo - reduced black, good hypo bredli will have no black around their banding for example
Double means it carries 2 morphs, usually 2 morph will make a new single morph