Selective breeding:
Selective breeding of domesticated animals is an example of artificial selection, which occurs when man directly intervenes in the breeding of animals to produce desired traits in offspring. As a result of many generations of selective breeding, domesticated breeds can show significant variation compared to the wild counterparts, demonstrating evolutionary changes in a much shorter time frame than might have occurred naturally.
Examples of selective breeding include: -Breeding horses for speed (race horses) versus strength and endurance (draft horses). - Breeding dogs for herding (sheepdogs), hunting (beagles) or racing (greyhounds). - Breeding cattle for increased meat production or milk. |
Gene pool:
Creating genetically modified foods increase the gene pool, as we are altering genetic make-up. Same with genetic diversity.