inbreeding can cause meager problems for the pups, id advise against breeding a brother and sister of any breed or animal.
inbreeding
Merle is not a color seen in purebred American Pit Bull Terriers or American Staffordshire Terriers. So any "pit bull" of this color is a mixed breed with a merle carrying breed (often Catahoula in the case of pit mixes) having been crossed in. This said, yes a brindle and merle breeding has the potential of producing 50% merle puppies and 50% non-merle. Brindle to merle may also produce a combination pattern of brindled merles.
If you cross a purebred dominant and a purebred recessive individual, the offspring would be considered hybrids, not purebreds. Purebreds result from breeding within the same purebred line, whereas hybrids are the result of crossing individuals from two different purebred lines.
Selective breeding is the way we got this purebred cocker spaniel with the best nose around.
It means that no non-purebred (i.e. half hanoverian, half welsh) howrse are allowed in your affix. andalina
The Pit Bull Terrier (or American Staffordshire Terrier) was first bred from large Staffordshire Bull Terriers - a similar English breed. American breeders wanted a larger version of the English so selected the biggest offspring for further breeding. They were (and still are illegally) used for fighting other dogs in organised fighting rings.
Not at all, I do it on a regular basis.
A purebred dog contract contains the pedigree of the dog for at least 5 generation of proof purebred status. The contract usually also contains the breeding right given or kept between the breeder and the buyer.
Professional breeder's who choose only the best lines.
Truebreeding
They are most closely related to bull terriers and emerged from crossings between bull terriers and other terriers that were around in the 17th century.
First of all, that is sick to breed your dogs. Dogs are for people to enjoy and not to breed and make puppies. That is almost like puppy mills (which is disgusting and cruel.) You will not get a purebred bull-mastiff puppy. You ahouldn't want a purebred just get a mutt they are probably more loveable. I think that onl,y wanting a purebred is very selfish. The dog will be just like the dog in the dog shows. TOOOOO PERFECT!!! GET A CUTE DOG THAT IS NOT PUREBRED THEY ARE JUST AS GOOD!!!!!!!!!!!!!!Answer 2:I'm fairly sure the puppies would not be purebred bullmastiffs. The bullmastiff breed originated by breeding "bulldog" type dogs together until it resulted in a breed of dog which look very similar to each other and whose puppies can be predicted to look and act very similar their parents, not by breeding purebred English mastiffs and purebred English bulldogs together. The result of breeding an English bulldog and an English mastiff together would just result in a "mutt" type bulldog.