This is, in my mind an interesting project!
The patternless gene has not yet been recognized as a genetically inheritable trait, it is at present thought to be random chance, a genetic 'accident', so to speak.
I don't believe that, I think it is genetic and I kinda have a little bit have proof of that, sorta.
Anyway, in 2008 I paired a T+albino male to a patternless female, hatching several clutches from this pairing, with varying degrees of pattern, I hatched 2 almost completely patternless individuals out of nearly 40 eggs, both female - sadly, both perished. I hatched many with regular pattern, rather mottled but pale, and several individuals with 'patternless-necks' only having lateral stripes stretching down the neck fading to a 'proper' pattern in the midsection and fading to patternless as normal on the final third of the body. Of these I kept 1.0 patternless-necked individuals & 1.1 with the pale pattern.
They are all feeding and growing well, theoretically in late 2010 or 2011 I shall be able to breed these through and see what happens! until then, enjoy these photographs.

Above: The female I kept from this pairing. One of the males I kept from this pairing.