4. Why do people have to be careful when breeding purebred doqs?

While quality breeders do test prospective parent dogs for defective genes -- and avoid breeding them if there are defects -- the broad problem of defects continues to grow as current breeding practices narrow the gene pool ever further. If you insist on a purebred puppy, then by all means, you should have one

this is true, assuming that the allele is completely recessive and incomplete dominance is not a factor.

i dont know it at allnow im just getting points at this pint