1. Deoxyribonucleic acid
DNA
Deoxyribonucleic acid

2. Structure and function of DNA
DNA is molecule shaped like a double helix, located inside the cell nucleus
Two chains linked by pairs of bases, the whole structure looks like a ladder
Each rung is formed by a base pair

4. 4 bases: adenine, cytosine,
guanine, thymine
- Each bases only pairs with one other type of base:
Adenine(A) always with thymine (T)
Cytosine( C ) always with guanine (G)

6. Base pairs are arranged in a sequence along the double helix DNA
Arranged like a language
Individual's or species’ genome: the entire base pair sequencing
Ex. Human= 3 million base pairs
Human Genome: complete set of genetic information on an individual or species

7. Gene
A job segment of DNA that contains the genetic information required to carry out a particular function.
Human genome: approx genes
Determines how body works, and characteristics.
Ex. Hair colour, how lungs function etc.

8. Genetic Diversity
All individuals have unique DNA (except identical twins)
Each gene different variety & form
ex. Eye & hair colour
Genetic Diversity: includes all the possible genetic variations of a species

9. Activity
Do “Decode Yourself”
Refer to pages in textbook

10. Homework:
Read p
Do. #’s 3-7, p. 152 TB