Article: Dog-oxyribonucleic acid; A few canine-loving geneticists are mapping the dog genome, saying their efforts will benefit people and dogs.(NEWS)

Where do Dalmatians get their spots? Why do greyhounds run and huskies pull? What makes Labradors so relentlessly happy?

The answer, as any breeder knows, lies in their genetic inheritance, the product in most breeds of hundreds of years of selection - not by nature, but by the humans who designed dogs to do their bidding.

Now, in the age of molecular biology, purebred dogs are being recognized as an exquisite species for the study of genetics. Once again they are serving humans, this time in tracking and identifying the many genetic diseases that both have in common.

And because among mammals dogs have the widest array of complex ...

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