Name:____________________________________________Date: _______

Dog Tales - NOVA

( https://www.pbs.org/wgbh/nova/video/dog-tales/ ) ~54 min 2020

___ 1. During the brain imaging test, the pink toy shown to the dog let the dog know to expect what?
          a) food         b) praise            c) punishment

___ 2. Dogs evolved from what wild ancestor?     a) wolves      b) coyotes        c) hyenas

___ 3. Forensic DNA examination found the earliest known ancestors of modern dogs occurred __________ years ago.
           a) 100,000         b) 30,000         c) 15,000

___ 4. The foxes in the experiment are tested by what procedure?

a) a human placing their hand in the cage
b) a scan of the fox’s brain
c) the reaction of the fox to other foxes

___ 5. What happened to the foxes after 10 generations of selective breeding the foxes for tolerance?
           a) they become more aggressive    b) they act like dogs     c) they learn to bark

___ 6. Selective breeding for a behavioral trait, like friendliness, will increase the frequency of:
          a) other traits, like fur color            b) offspring in a litter            c) early death

___ 7. The original dog probably resembled what modern breed?
          a) poodle            b) german shepherd            c) basenji

___ 8. How many genes control the size differences of dogs?    a) 2        b) 7       c) 54

___ 9. In the test of cooperative skills, wolves were:

a) more cooperative than dogs
b) as cooperative as dogs
c) less cooperative than dogs

___ 10. What makes the dog uniquely trainable?

a) its exceptional intelligence
b) its submissiveness
c) its bond with humans

___ 11. What hormone is responsible for the dog’s “loving” behavior?
          a) estrogen             b) oxytocin             c) testosterone

___ 12. What condition in humans shows a mutation in the gene that controls this hormone?

a) Williams Syndrome
b) Down Syndrome
c) Edward Syndrome

Overall Summary: Describe the changes that occurred during the evolution of dogs from wolves.