1. AP Biology Discussion Notes Tuesday 1/6/2015

2. Goals for Today Be able to name the scientists that helped build our knowledge of DNA and be able to describe their contributions Be able to discuss how scientific understanding is built Be able to list or understand the contributions of less known scientists Be name the 3 basic components of DNA

3. Question of the Day 1/6 If you have a species with 35% Cytosine what percentage of the other base pairs would there be? –A- –G- –T- 2.Who discovered this “rule”

4. Question of the Day 1/6 If you have a species with 35% Cytosine what percentage of the other base pairs would there be? –A- –G- –T- 2.Who discovered this “rule”

5. Turn in Goals

6. Base Pairing Purines: Pyrimidines: Purine - Pyrimidine

7. Base Pairing Look carefully— Why can A only pair with T and C can only pair with G???

8. Base Pairing Which pairs would come apart more easily? (Take less _______ to pull apart)

9. Base Pairing Which DNA strand would come apart at a lower temperature? 1.25% Adenine 2. 45% Adenine

10. Secret of Photo 51 Initial Thoughts & Questions What is the climate like for women in the 1940s? Historical Treatment of Minorities

11. Discovery of DNA’s Structure Secret of Photo 51 Video