Adopting an animal from a shelter is not free, but it is significantly cheaper than buying from a reputable breeder. But you get a lot for your dollar as your animal will probably already have all its vaccines and have been spayed and neutered. Moreover, what you do spend gets reinvested ...
The instructions that tell your dog what to look like, and what color to be, come packed in genes. And genes come in pairs. This is true for the gene that determines whether or not the Labrador will be brown (this gene is calledb) or black (B). Every Labrador has either two genes...