Quote:
Originally Posted by Cirlonde  [F Sans MS]I know I'm the farthest thing from an expert, but just from what I've noticed looking at pictures...the biggest visual difference I can see is that Biewers tend to have a similar pattern/layout to their colors, as Misty said. Not always, but usually. And partis seem to have a very wide array of pattern. Some of them are mostly white, others just have patches, etc. So for the layman photo viewer, that's what I see as differences.
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The reason that most Biewers have a consistent spotting pattern is do to the fact that the gene responsible for their white markings is called the Irish Spotting gene. Characteristics of this gene are white legs, chests, neck, under body and tip of tail. White markings don't cross over the back between the shoulder and tail.
Parti's white markings on the other hand, are caused by the piebald gene and extreme white piebald gene. There is no consistent pattern with these spotting genes, it's very random. Extreme white's normally have some dark markings on head and near the tail with minimal markings on body, some extreme white piebalds are almost solid white.
Another source for learning about Parti's is this website:
CYTC...Party Color