1. DNA

2. NUCLEOTIDES: Makes up DNA DNA is made of only 3 units: Sugar Phosphate Base

3. BASES: The main biological function of a nitrogenous base is to bond nucleic acids togetherbondnucleic acids The 4 Bases that make up DNA are: Adenine Thymine Guanine Cytosine

4. FRANKLINS DISCOVERY Rosalind Franklin used X-Ray diffraction to create images of DNA molecules.

5. CHARGAFF’S RULE Amount of Adenine= Thymine Amount of Guanine=Cytosine

6. DNA DNA: Stands for Deoxyribonucleic Acid

7. DNA Hereditary Material

8. DNA STRUCTURE: Consists of two chains of molecules in a ladder shape twisted to form a double helix.

9. WATSON AND CRICK Watson and Crick concluded that DNA was a double helix based on the X-Ray pictures made by Rosalind Franklin. They used this information to make the first DNA model.

10. DNA REPLICATION DNA duplicates before mitosis and meiosis

11. GENES: Segments of DNA that carry hereditary material and instructions that are passed from parent to offspring.

12. GENES LOCATION: Genes are found on chromosomes which are structures in the nucleus.