1. History of Genetics/ INTRO TO DNA

2. (1) Gregor Mendel “The Father of Genetics”
A Monk: Studied pea plants in in a garden
Discovered dominant and recessive traits

3. Created images of the DNA molecule that showed its spiral shape.
(2) Rosalind Franklin
Created images of the DNA molecule that showed its spiral shape.

4. (3) James Watson & Francis Crick
These two scientists discovered the complete structure of DNA
“The Double Helix”

5. The Structure of DNA

6. (4) Shape DNA has a double helix shape
If you took a ladder and twisted it, it would look like DNA
Helix = Spiral

7. Composition

8. (5) 1. DNA is made up of phosphates, sugars, and bases (purines and pyrimidines)

9. (5)
2. A nucleotide is made up of 1 sugar, 1 phosphate and 1 base (Circle a nucleotide on your paper!)

10. A Nucleotide
PHOSPHATE
BASE
SUGAR

11. (5)
3. The nucleotides are connected together by the phosphate and the sugar (Think: Sugars and Phosphates = “Side Poles” of the Ladder)

12. "Side Poles“
"Side Poles"
Sugar and Phosphate
"Side Poles“

13. A T G G

14. “Between “
Bases
“Between “

15. When the bases pair together, they form a Double Helix.
(5) 4.
When the bases pair together, they form a Double Helix.
Purines
Pair With
Pyrimidines
Adenine
Pairs With
Thymine
Guanine
Cytosine

16. A T G G

17. A C T T C G A T C G