I have a Jolliff line tiger (banded animal). My male also produced one tiger female this past season, and the others were extremely busy patterned. The tiger stuck out like the black sheep in the family.
Jolliff has proven his line genetic. See the thread that Derek posted below.
Enchi's by themselves are banded. And there are some genetic bandeds (tigers) of different lines.
I also have a non-genetic banded female who throws busy patterned babies. She CH, and not from a proven line of genetic tigers.
The tigers (not to be confused with the desert/enchi tigers) CAN be replicated consistently, and at least the Jolliff line is at least dominant (similar to a pinstripe) in that it throws tigers and normals.
Both Zaphod and his daughter (I need a name) have a different looking "texture" to their color than normals do as well. They're lighter colored with a "soft" look to them.