Blotch wrote:ok - my bad - true the F2B thing does happen on the body.
The porthole thing though? Hmmm Doubtful - Show me an Aussie specimen without portholes that isn't an intergrade. I'd understand the american specimens cuz you have Very little Full blooded Eastern stock over there - majority of the US Easterns are from pairs that consist of intergrades, but Aussie stock? nope! I've never seen an aussie eastern without portholes other than a hypo or something to that effect - and even then with a hypo - you still see the portholes just differently.
It really depends on exactly what you consider "portholes". On the animal posted, some might consider those portholes -- just so thin and small that they connect to the stripe. THe picture below is a really poor example, but see how the stripes connect to the "portholes" and they are not wide at all (especially toward the back), but almost just part of the stripe. This animal is similar to the one posted, only the one posted has even thinner one's. Again, if it's a hybrid, that's exactly why they would be so thin, almost nonexistent.
Another baby with almost nonexistent portholes, and there are others out there that are more or less completely lacking. The animal posted by the member HAS them! They're just so small that they don't look like portholes, so essentially, these examples are irrelevant.
Here's an interesting example. Ignore the head and forelegs. You see this guys brown portholes? Imagine if the connecting stripes were the exact shade of brown. This guy would have NO portholes in your eyes! Exactly like the one posted by the new member. This guy's portholes do not widen at all and are even smaller than the stripes that run across its back.
Another example how portholes flow into stripes--just like the new user posted. Imagine if colors were identical, there would be no discernable porthole.
Here's Tiliquagirl's Chuckie....almost complete nonexistent portholes.
I hope you don't say you can see portholes! Again, it's an ambiguous term. Here, this could just be said that his stripe is starting at one side, and ending in the other. All the same size, and virtually no color change. No discernable portholes whatsoever. I have about a million more pictures.
Point is, some have wide, huge portholes. Others don't. Some have bright vibrant portholes that really stand out. Some don't. The possible combinations are endless. There's no "one way" or "absolute" or "always". There's just common trends and consistencies that make a species what it is.