1. Genetics

2. Cell DNA is found in the nucleus!

3. DNA Deoxyribonucleic Acid

4. Double Helix

5. Structure of DNA Double-Helix shape (Spiral Ladder) The sides are made of sugar (deoxyribose) “-ose” means sugar The rungs are made of 4 different kinds of nitrogen bases.

6. A binds with T C binds with G

7. Chromosome Is coiled up DNA

8. Chromosome

9. Like coiled up yarn Chromosome

10. AAATTT GGG CCC TTTAAA CCC GGG DNA Strand Chromosome

11. Chromosome s Come in pairs!

12. Chromosome Pair

13. Dad Mom Why Pairs?

14. 23 Kinds of Chromosomes

15. 23 pairs of Chromosomes

16. 46 Chromosomes total

19. Cell Nucleus Chromosome Gene DNA Base Pairs Great Test Question! Big Small Write this stuff down

20. What matches with… AAATTTGGGCCC?

21. What matches with… AAATTTGGGCCC TTTAAACCCGGG

22. True or False: Chromosomes in every nucleus in the body are identical. True! Each nucleus has an identical set of chromosomes.

23. James Watson and Francis Crick Two scientists credited for discovering DNA The helix shape was actually discovered by a woman, Rosalind Franklin.

24. What does this look like?