1. Unit 4 Review

2. DNA/RNA Structure Function
DNA Bases: (A,T,C,G)
A-T
C-G
*The order of nitrogen
bases= Genetic Code!
Nucleotide
1.Deoxyribose sugar
2.Phosphate
3.Base
Double Stranded
RNA Bases: (A,U,C,G)
A-U *NO T!
C-G
Nucleotide
1.Ribose sugar
2.Phosphate
3.Base
Single Stranded

3. Be able to understand…
Give the complementary base pairs for both DNA and mRNA
Questions about the genetic code
Why must the bonds between bases be weak
Structure of Nucleotides
What do Nucleotides contain in both DNA and RNA

4. Mitosis/Meiosis DNA must be copied before BOTH Mitosis and Meiosis!!
Cell growth
Diploid (2n)
Ex: 6->6
Meiosis:
Produces sex cells (Gametes= sperm + egg)
*Crossing Over
Haploid (n)
Ex: 6->3
DNA must be copied before BOTH Mitosis and Meiosis!!

5. PRACTICE Number of Divisions 1 2 3 4 Number of Cells ?
A dogs body cells contains 78 chromosomes. How many chromosomes are in a dog’s gametes? 23 39 78 46

6. Codon Charts
Objective: Using your codon chart, explain how a change in the last letter may not affect the amino acid that is coded for.
What are the codons that specify for Threonine?
_______

7. Mutations Practice
Protein 1 AUG CAG GGG CCC Protein 2 AUG CAG GGG CAC What kind of mutation is this? Gene/Chromosomal Point/Frameshift/Neither Specific: Protein 2 is nonfunctional. Why?

8. Transcription/Translation

9. Gene Expression https://www.youtube.com/watch?v=h_1QLdtF8d0
Main Points:
Genes are turned on and off in order for certain proteins to be expressed or shown.
Different cells are able to perform different functions because of gene regulation (ex: muscle cells and nerve cells)