1. Do Now 3.26 (Week 30) Objective: Describe and evaluate the impact of transgenic organisms on food production. Tasks: 1.Pass forward last week’s Do Nows 2.Syllabus change: All topics moved forward 1 day, except review and test (Th/F). 3.If you were a technology leader for an agricultural biotech organization, what genes or characteristics would you put into food crops? Why?

2. Corn… …is pretty important in our society.

3. Corn Chips

4. McDonald’s Meals

5. Drinks

6. Most Foods

7. Your Car

8. Demand is growing:

11. European Corn Borer:

13. Whatever shall we do? Option A: Insecticides

14. Whatever shall we do? Option B: I.P.M.

15. Whatever shall we do? Option C: Genetic Technology

16. Introducing Bacillus thuringiensis:

17. Enter Bt Corn…

18. Yay!!!! – Problem solved, right?

19. Problem 2: Weeds. Product = RoundupReady ® Crops This field of corn has lots of weeds in it. Weeds take nutrients from the soil the corn plant needs.

20. RoundUp Ready Corn RoundUp is a chemical that kills plants. 90% of the corn grown in the US is genetically modified to have resistance to RoundUp. Since the corn is resistant, farmers can spray roundup and kill everything but the corn

21. It worked for a while…

22. But there was VARIATION in the weeds A tiny % of the weeds were naturally resistant to the RoundUp and survived… Resistant Weed

23. Now, that weed had offspring… and they had offspring… etc. etc. Since resistant weeds are the only ones that survive and reproduce, they are now far more common in corn fields. Resistant Weed Resistant Weed Resistant Weed Resistant Weed Resistant Weed