Sample study questions for quiz 1
(to be revised for 2009)

1. Name two zoonotic diseases we can catch from sheep.
2. Two rams are slaughtered, each at 110 pounds. One lamb is a Suffolk (large mature size) and the other is a Southdown (small mature size).

   Which carcass will be leaner and which will be fatter? Explain.

   Which ram will have grown more efficiently? Why?

   Which ram will have grown faster? Why?

3. Dorset and Finnsheep ewes are slaughtered at the same weight. Which breed has a greater percentage of muscle in the high priced cuts? Why?
4. Rib eye area (REA) is a reflection of muscle __________ not muscle __________.
5. Write at least three reasons to winter graze sheep.
6. List three categories of expenses associated with a sheep farm.
7. List four categories of sheep breeds and name and describe a breed associated with two of the four categories.
8. Sheep have how many pairs of chromosomes? How does this relate to the belief that a given ram is unlikely to be worth more than $1000?
9. What is the main reason that heritability of fertility traits is low and heritability of fleece traits is high?
10. If the heritability of accelerated lambing in the STAR system is 0.1 and ram A produces daughters that lamb 0.1 times more per year than the daughters of unselected rams, what is the expected progeny difference for accelerated lambing for ram A?
11. Name and describe two gene mutations in sheep for which there are DNA tests that can be used for selection.
12. What four factors affect genetic progress per year due to selection?
13. How are Cornell Dorset ram replacements selected?
14. Draw a graph showing how muscle, fat, and bone of a Suffolk ram grow in relation to carcass weight. On the same graph, draw the relationship for a Southdown ram.