Teams of genes, cells formed more complex than ever, and then directed the cells cooperation that formed complex organisms. Variation and selection favored teams of genes that shaped animals with good skin and protecting the hungry mouths, animated by nerves and muscles, eyes and brain slave. As Richard Dawkins put it, genes built ever more sophisticated machines of survival, to help their own copy. When dog genes are copied, they are often mixed with the genes of other dogs that have been selected by people who then selected, which puppies to keep and how to reproduce. For thousands of years, people have turned a wolf-like animals in the gray hounds, decorative poodles, dachshunds, and Saint Bernards. Through the selection of how genes to survive, people have changed and the body, and the nature of dogs. Human desires have defined success for dog genes; other factors have defined success for wolf genes.
Un cÂur au soleil
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