1. DNA: Mitosis & asexual reproduction
Day 3
DNA: Mitosis & asexual reproduction
Drill:
What is the correct order of the following:
Protein / Gene / Trait
Conceptual Q of the Day:
Why it is important for cells to reproduce?

2. Remember… What dna looks like?
DNA is made up of 3 key parts (NUCLEOTIDE):
Nitrogenous Bases!
Adenine – Thymine – Guanine – Cytosine
At The Grand Canyon
Phosphate Group
PO4
5 Carbon (C) Sugar
Deoxyribose

3. Remember… Why do we all look different?
What causes a fly to look different than a mouse?
Chromosomes have genes that can turn on and off
Genes make (code for) specific proteins
Proteins express specific traits
8 chromosomes
40 chromosomes
Gene  Protein  Trait

4. Why is cell size Important?
Think about it: What happens to the energy needs of an organism as it gets larger?
As a cell grows, its energy needs increase.
Cells have limitations to growth.
Eventually, somatic (body) cells will divide into two identical cells due to limitations in growth caused by factors like energy needs.

5. Activity: Cell Cycle
With your partner, use the internet link provided (CellsAlive)
Complete the circular diagram of the eukaryotic cell cycle in your notes!
The circular diagram is the first image on the screen!
Fill that cycle in on the circle provided
Pay attention to the cell “N” number in the middle!
Explain the specific events that occur at each stage as the animation stops in key places!

6. What HAPPENS IN AN EUKAROTIC CELL CYCLE?
Cells undergo mitosis to create 2 “daughter” cells with:
Identical genetic information to parent cell
Identical genetic information to each other
Major Phases:
G1 phase
S phase
G2 phase
M phase

7. What is the purpose of mitosis?
Growth –grow to a larger size
Repair –fix damaged cells
Replace –replace old or dying cells

8. Practicing mitosis!!
How many chromosomes would a skin cell have in an organism whose kidney cells have 46 chromosomes?
Hint: Both skin and kidney cells are somatic (body) cells!
How many chromosomes would a cell created through mitosis have in an organism with a bone cell with 26 chromosomes?

10. DNA: Asexual Reproduction
Day 3
DNA: Asexual Reproduction
Drill:
What is asexual reproduction?
Conceptual Q of the Day:
Why it is important for cells to reproduce?

11. Prokaryotes vs. Eukaryotes
Don’t have organelles
Have organelles
Have one circular chromosome
Have many linear chromosomes
Store their chromosome in a region called the “cytoplasm”
Store their chromosomes in an organelle called the “nucleus”

12. what is asexual reproduction?
A type of reproduction by which offspring arise from a single parent.
The offspring inherit the genes
of that parent only!
There is no fertilization!!
Three examples of asexual reproduction:
Binary Fission
Budding
Vegetative Growth

13. what is Vegetative Growth?
what is Binary Fission?
When a bacteria cell splits into two equal new cells.
what is Budding?
This is a Hydra
When the offspring grows directly out of the body of the parent
what is Vegetative Growth?
When the plants produce offspring without seeds or spores

14. Binary Fission
Binary Fission is a method of asexual reproduction that involves the splitting of a parent cell into two approximately equal parts.

15. Budding
Budding is a form of asexual reproduction, an offspring grows out of the body of the parent.

16. Vegetative Growth
Vegetative growth is a form of asexual reproduction in plants whereby new individuals arise without production of seeds or spores.

17. Exit ticket
When you are done with your gene expression activity find your exit ticket sheet in the folder on the chair up front.
In the first block (on the front) write a vocabulary word from the word wall.
In the first block (on the back) write the definition or draw an image of that word.
Do this for the third box!
Extra points for three students who share out their vocabulary flash card!!