What distinguishes the genetic reality of the parti pattern from its implied frequency within AKC-focused breeding pools?

Answer

It is a matter of selection pressure applied by breeders aiming for a specific outcome, not gene difficulty to express naturally.

The text indicates that the genes causing the parti pattern are naturally present and can appear irregularly, even in litters produced by parents carrying standard colors, proving the color is genetically viable. The implied rarity within established show lines is not due to the gene being hard to express, but rather due to deliberate 'selection pressure.' Breeders aiming for AKC conformation champions actively screen out or avoid breeding dogs carrying the parti gene, thus statistically lowering the likelihood of a parti puppy emerging from those specific, highly curated breeding pools.

What distinguishes the genetic reality of the parti pattern from its implied frequency within AKC-focused breeding pools?
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