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All our modern breeds of dog are descended from the wolf.

All our modern breeds of dog are descended from the wolf. Very fast and agile. Loyal and intelligent. Hard-working with a thick coat. Large and strong. Small and friendly. Courageous, with a very strong jaw. So how come they all look and act so differently?.

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All our modern breeds of dog are descended from the wolf.

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  1. All our modern breeds of dog are descended from the wolf.

  2. Very fast and agile Loyal and intelligent Hard-working with a thick coat Large and strong Small and friendly Courageous, with a very strong jaw So how come they all look and act so differently?

  3. Gamekeepers in the 1800s had a problem. Poachers were entering their land and stealing their game-birds before the shooting season. Their dogs (mastiffs) were big, strong dogs and great companions but they were not aggressive or fast enough to chase after the poachers. Another breed known to them was the bulldog. This was quick and aggressive but not strong enough to pull the poachers down and hold them until a gamekeeper arrived. What could they do?

  4. Bulldog – Aggressive and quick but small. Mastiff – large and strong but slow and not aggressive. Bullmastiff – Large, quick, strong and aggressive Humans have changed the way dogs look and act by choosing which dogs to breed together. + This is called Selective Breeding Perfect!

  5. Most farm animals (and crops) have been selectively bred to possess a ‘desirable’ characteristic. • AgriculturalScientists can produce plants that are resistance to frost and pests, produce food with a long shelf life, or increase the sweetness.

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