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Often mistaken for a "double merle", a harlequin merle (or just harlequin), is a Great Dane that carries both the merle pattern allele and the co-dominant modifying gene for harlequin, PSMB7 (also known as H). This causes most or all of the diluted "blue" color to be replaced with white, resulting in a dog that is mostly white with black patches.
An argument persists concerning whether the American Pit Bull Terrier and the American Staffordshire Terrier are two separate breeds or still the same breed. [53] Pit Bull and AmStaff breeders have distanced themselves from each other by pursuing different goals over the last 30 years, producing dogs with physical and temperament differences.
The American Pit Bull Terrier (APBT) was the foundation (parent breed) used to create the American Bully. [1] The APBT has maintained a characteristic appearance and temperament for over a century, [1] with different strains of APBT emerging within the breed, each with different physical attributes. [1]
Pit bulls are an outgoing, caring breed and play well with children. 3. Pit bulls aren't as scary as you think. ... They actually scale better on the American Temperament Test Society than other ...
Since then, both parents had to be AKC registered in order to register the offspring. Breed selection was based entirely on conformation and established breed standards that, for decades, has transformed the American Staffordshire Terrier into a much different breed from the American Pit Bull Terrier. [9] [11]
The merle gene is "faulty" with many merle animals having one odd patch of a third shade of grey, brown or tan. On homozygous M/M "double merles", black is replaced with ~25% black, ~50% silver and ~25% white, again with random variation, such that some animals have more black or more white.
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Often, solid coat Catahoulas have small splashes of other colors such as white on their face, legs or chest. The leopard-like coat of most Catahoulas is the result of the merle gene. The merle gene does not normally affect the entire coat of the dog, but dilutes the color only in areas that randomly present the characteristic of the gene.