1. Focus Lesson You are working on the Diagram Column
Use your notebook as a reference. NO TEXT BOOKS.

2. How do cells divide to create genetic diversity?
Essential Question
How do cells divide to create genetic diversity?
Daily Objectives:
SWBAT compare and contrast different types of haploid and diploid cells including gametes, somatic cells, and zygotes.
SWBAT explain why meiosis causes genetic variation as a result of crossing over, sorting, and recombining of genes

3. How will we get there? Lab- page 22 DNA replication
Last Class
This Class
Lab- page 22 DNA replication
Homework was due page 23 DNA replication
DNA replication activity
Quiz #4- DNA replication
Corrections/ Enrichment
Meiosis notes- pg 41
Meiosis pictures- pg 40

4. Home learning is LEARNING!
If your notebook is not complete through page 37 you’re behind!
Please catch it up!

5. DNA Replication Activity
Take the card you were given.
If you need to review what that is please look on pages 35 and 37 in your notebook.
We will now demonstrate the process of DNA replication.
ENGAGEMENT LEVEL SHOULD BE 100%
Out of your seats please! 

6. Create nucleotides! As many as we can.
First
Create nucleotides!
As many as we can.
Remember a nucleotide is a phosphate, 5 carbon sugar, and a nitrogen base
Where are nucleotides located within the eukaryotic cell?

7. Let’s make this strand of DNA:
Next
Let’s make this strand of DNA:
C-A-G
What would the complementary strand be?
Remember the rules of base pairing!!!

8. We now have a double strand of DNA.
Next
G- T- C
These nucleotides should be added.
We now have a double strand of DNA.
This is in the nucleus of your cells.

9. Time to replicate the DNA
When in the cell cycle does DNA replication occur?
Synthesis of Interphase
What must happen first to our DNA double strand?
It must be separated into two strands by the enzyme- Helicase

10. Next Step- Unzip the genes!
Helicase needs to break the bonds that hold the base pairs together.
What are those bonds?
Hydrogen Bonds

11. 2 separated complementary strands
Result
2 separated complementary strands
Which enzyme is now going to attach to each template strand to build more DNA?
DNA polymerase

12. DNA Polymerase
You need to determine which nucleotides in the nucleus need to be added to each template/ strand.
Proofread your work!

13. What are the final products?
Results?
Two Identical Strands
Each containing half of the original and half new
Semi-conservative replication

14. Quiz #4 DNA replication- page 39
Clear your desks
Volume level zero
You will have 10 minutes
When you are done turn your quiz over and sit quietly.

15. Let’s grade! Take a colored writing utensil out of your box.
Put a check if the answer is right and an X if the answer is wrong.
If it is wrong please indicate the correct answer for the student’s paper which you are grading.

16. Corrections Or Enrichment page 38
Corrections- 60% or below
Enrichment S
Statement: What is the correct answer? R
Reason: Why is that answer correct? E
Evidence: What page in your notebook did you find the correct answer?
Use the following DNA segment:
ATTCGG
Find the complementary strand.
Replicate the DNA.
Diagram the end products.
Describe the enzymes involved.

17. Let’s predict! Think- pair- share
Why aren’t ALL siblings with the same parents twins?
My brother and I look alike, but we are NOT twins even though we have the same parents.
Time to learn about MEIOSIS!

18. Notes: MEIOSIS (on page 41) 3 Types of Cells in the body-
Gametes- haploid sex cells (eggs, sperm)
Somatic cells- diploid body cells that make up most of your body (heart, liver).
Zygote- cell that forms when a male gamete fertilizes a female gamete.
Which type of cell listed above can not be found in males?

19. Vocab Reflection
We are going to use Page 40 to reflect on our notes today. Let’s set it up together.
IT IS IMPORTANT THAT YOU FOLLOW ALONG AS I DO THIS UNDER THE DOCUMENT CAMERA.

20. Page 40: Vocabulary Reflection
Type of Cell:
Synonym:
How many sets of chromosomes
Example(s)
Gamete
Somatic Cell
Zygote

21. Check your work Type of Cell: Synonym: How many sets of chromosomes
Example(s)
Gamete
Sex Cell
1 set
Egg, Sperm
Somatic Cell
Body Cell
2 sets
Heart, Liver, Kidney, Brain, Stomach, etc.
Zygote
Fertilized Cell NA

22. Needed for sexual reproduction
Continuing on Page 41
Meiosis
Needed for sexual reproduction
Cell division which produces gametes (egg, sperm) which are haploid cells

23. IS INTERPHASE PART OF MEIOSIS? WHY OR WHY NOT
Stages of MEOSIS
IS INTERPHASE PART OF MEIOSIS? WHY OR WHY NOT
Interphase: Preparing for cell division
DNA Replicates during synthesis
CELL NOT DIVIDING
Prophase I: Homologous Chromosomes pair up. Crossing over can occur.

24. Please Continue…
Metaphase I: Homologous chromosomes pair up in middle (homo means same)
That means TWO sets of Xs! One from your Mom one from your Dad (both code for same trait)
Anaphase I: Homologous chromosomes are pulled APART
(Dad’s chromosome goes to one side, Mom’s to the other)
Telophase I/ Cytokinesis: Cell membrane starts to pinch creating 2 daughter cells
genetically different!
Address misconception of homologous meaning just color

25. Reflect on Concept: Meiosis I Diagram
This diagram is on page 174 of the textbook
Reflect on Concept: Meiosis I Diagram
Paste in the guide to help organize your drawings. (I will demonstrate)
Diagram each phase of Meiosis I that you just took notes about.
Use color!
Interphase
Prophase I
Metaphase I
Telophase I and Cytokinesis
Anaphase I

26. Meiosis 2- looks like mitosis
Prophase II- chromosomes condense/ organize
Metaphse II- chromosomes line up in the middle of the cell
Anaphase II- sister chromatids are pulled apart
Telophase II/ Cytokineis- 4 unique haploid daughter cells/ gametes are formed

27. Reflect on the Concept Diagram Meiosis II
Flip your guide open to find the stages of Meiosis II. Use your notes, the PowerPoint, or the textbook to complete your drawings. USE COLOR
Telophase I and Cytokinesis I
Metaphase II
Anaphase II
Telophase II and Cytokinesis
Prophase II

28. Vocabulary for page 42 Crossing over:
When homologous chromosomes exchange genetic information during meiosis I (How can you show this with the beads?)
Homologous chromosomes:
Chromosomes that have the same genes (eye color), even if the alleles are different (brown, hazel, blue)
DRAW PICTURES!!!!!

29. Time for independent practice
Meiosis practice hand out- page 29
Volume level 0
Raise you hand if you have any questions.
YOU CAN DO THIS!!!!

30. Exit Ticket: POST IT STYLE
Pick one of the daily objectives and explain it in words that an elementary school student would understand.
SWBAT compare and contrast different types of haploid and diploid cells including gametes, somatic cells, and zygotes.
SWBAT explain why meiosis causes genetic variation as a result of crossing over, sorting, and recombining of genes