| His enduring fame, or infamy, rests on eugenics, which means, crudely, the selective breeding of humans. |
| Through selective breeding the Bedouins developed an Arab horse which was tough and yet beautiful. |
| It is important to remember that each breed of dog has its own unique qualities, reinforced by hundreds of years of selective breeding. |
| In other words, the colour may be as much the result of selective breeding as of ancient purity. |
| With selective breeding, the investigator can shape behavior to reflect specific features or symptoms of a mental disorder. |
| Thus, the modern English setter was developed through selective breeding during the 19th century. |
