The ones Peter has are called squaretails,and it IS genetic.Unfortunatly people label there laddertail/circle backs as Squaretails.I am working with this morph and should produce some nice Squares this year,the pair are also het albino.
Also,we have a line that DOES produce laddertails and reverse stripes(pics).
Some ladders can be genetic,but the only way to know is to breed them.
Mike

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