DNA is a large polymer made of nucleotides linked together in a double helix shape. Nucleotides consist of a sugar, phosphate, and one of four nitrogen bases (A, T, C, G). Genetic information is encoded in the sequence of these nitrogen bases along the DNA strands. Specific base sequences called genes code for the production of individual proteins, which determine our physical traits.

1. DNA

2. DNA
Deoxyribonucleic Acid

3. DNA is shaped like a
double helix

4. DNA is a large polymer formed by linking
nucleotides.

5. DNA is a large polymer formed by linking
nucleotides.

7. Nucleotides have 3 parts:

8. Nucleotides have 3 parts:
1. Sugar

9. Nucleotides have 3 parts:
1. Sugar
2. Phosphate

10. Nucleotides have 3 parts:
1. Sugar
2. Phosphate
3. Nitrogen Base

11. Nucleotides have 3 parts:
1. Sugar
2. Phosphate
3. Nitrogen Base

12. Nitrogen Bases come in 4 amazing
flavors (A, T, G, and C)!

13. Nitrogen Bases come in 4 amazing
flavors (A, T, G, and C)!

15. Genetic information is encoded in the
sequence of nitrogen bases

16. Genetic information is encoded in the
sequence of nitrogen bases
ATGCTTAAAGCTATA

17. Genetic information is encoded in the
sequence of nitrogen bases
ATGCTTAAAGCTATA
TACGAATTTCGATAT

18. Genetic information is encoded in the
sequence of nitrogen bases
ATGCTTAAAGCTATA
TACGAATTTCGATAT

19. Genetic information is encoded in the
sequence of nitrogen bases
ATGCTTAAAGCTATA
TACGAATTTCGATAT
These “coding sequences”
are known as genes.

21. Each gene codes for the production of a
specific protein.

22. Each gene codes for the production of a
specific protein.
DNA

23. Each gene codes for the production of a
specific protein.
DNA

24. Each gene codes for the production of a
specific protein.
DNA Protein

25. Each gene codes for the production of a
specific protein.
DNA Protein
Characteristics are the physical expression
of the proteins we make!!!

26. Each gene codes for the production of a
specific protein.
DNA Protein
Characteristics are the physical expression
of the proteins we make!!!

27. Each gene codes for the production of a
specific protein.
DNA Protein trait
Characteristics are the physical expression
of the proteins we make!!!

28. Each DNA molecule in a cell forms a
single chromosome.
There are 23 pairs of
chromosomes in the nucleus
of every human body cell.