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Name _____________________________________________ THE SCIENCE OF DOGS Period ________ Date ______________ Seat _________ Do your best to answer the following questions as you watch the video. After the video we will discuss the answers. 1. What is the Genus species classification of the modern dog? _____________________________ ____________________________ 2. What percent of today’s breeds did not exist 130 years ago? _____________________ 3. What is the type of selective breeding used in manipulating dog genetics called? ____________________________________ 4. What is the Dogo argentino dog used for in Texas? ___________________________________ _______________________________________________________________________________________________ 5. The Dogo argentino is a genetic “stew” of the dogs listed in the table below. Fill-in the missing spaces in the table. a. b. c. d. e. f. Dogs in the Evolution of the Dogo Breed of dog Contribution Pointer Sense of smell Great Dane Irish Wolfhound Insticts for wild game Mastiff Power Great Pyrenees Gentleness 6. The dog’s evolutionary ancestor was most like the __________________. 7. A dog’s nose has as many as _____________________________ olfactory receptors 8. List two jobs a dog uses its nose for. ____________________________________________________________________________________________ ____________________________________________________________________________________________ 9. How many different kinds of chemical explosives can the Sulimov dog of Moscow recognize? ___________________ 10. What kind of wild dog makes up part of the genetics of the Sulimov dog? ______________________ THE SCIENCE OF DOGS 11. Regarding their DNA, dogs are __________ percent similar to one another. 12. What influence does the IGF-1 gene have in dog phenotypes? _______________________________ 13. The signficant number of ______________________repeats in canine genes may help explain the rapid increase in the number of dog breeds. 14. List two unintended consequences (genetic diseases) of the “breed standard” in maintaining purebreds for dog shows. 15. What weird obsessive-compulsive behavior did Tally, the bull terrier exibit? 16. What vector is used to repair the defective Vitamin-A gene in blind dogs? _____________________ 17. How does the wolf differ from the dog regarding its communicating with humans? The following question was not in the video. 18. The Sulimov explosives-sniffing dog of Moscow is a hybrid between the Lapponian Herder and the Golden Jackal. Modern dogs, however, cannot produce fertile offspring with the Side-striped Jackal and the Black-backed Jackal. Why do you think this is so? (Hint: think Lapponian Herder chromosomes) Golden Jackal