( https://www.pbs.org/wgbh/nova/video/dog-tales/ )
___ 1. During the brain imaging test, the pink toy shown to the dog let the dog know to expect what?
___ 2. Dogs evolved from what wild ancestor?
___ 3. Forensic DNA examination found the earliest known ancestors of modern dogs occurred __________ years ago.
___ 4. The foxes in the experiment are tested by what procedure?
- a human placing their hand in the cage
- a scan of the fox’s brain
- the reaction of the fox to other foxes
___ 5. What happened to the foxes after 10 generations of selective breeding the foxes for tolerance?
- they become more aggressive
- they act like dogs
- they learn to bark
___ 6. Selective breeding for a behavioral trait, like friendliness, will increase the frequency of:
- other traits, like fur color
- offspring in a litter
- early death
___ 7. The original dog probably resembled what modern breed?
- german shepherd
___ 8. How many genes control the size differences of dogs?
___ 9. In the test of cooperative skills, wolves were:
- more cooperative than dogs
- as cooperative as dogs
- less cooperative than dogs
___ 10. What makes the dog uniquely trainable?
- its exceptional intelligence
- its submissiveness
- its bond with humans
___ 11. What hormone is responsible for the dog’s “loving” behavior?
___ 12. What condition in humans shows a mutation in the gene that controls this hormone?
- Williams Syndrome
- Down Syndrome
- Edward Syndrome
** Overall Summary: Describe the changes that occurred during the evolution of dogs from wolves.