1. Comparing Mitosis and Meiosis
SWBAT: Compare and contrast mitosis and meiosis in terms of the number of chromosomes in the resulting cells, and its effect on genetic variation
EQ: How does the sorting and recombination of genes result in genetic variation?

2. Definition Meiosis Mitosis
Nuclear division to create gametes (sex cells)
Nuclear division that divides somatic (body) cells

3. Function/purpose Meiosis Mitosis Growth
Repair
Development
Produce gametes in sexually reproductive organisms

4. Type of Reproduction Meiosis Mitosis Sexual reproduction – Asexual-
Two parents
Offspring are genetically unique
Asexual-
One parent
daughter cells are genetically identical

5. Occurs in what type of Cell
Meiosis
Mitosis
Gametes (sex cells)
Ovaries/testies
Somatic cells (body cells)

6. Genetically Identical?
Meiosis
Mitosis
genetically unique to parent
genetically identical to parent

7. Crossing-over? chromatids intertwine and swap pieces
Meiosis
Mitosis
occurs during prophase I causing genetic variation
Crossing-over does not occur

8. Pairing of Homologous Chromosomes
Meiosis
Mitosis
Chromosomes pair during Meiosis I (prophase I)
Do not pair

9. Rounds of division Two rounds of division One round of division
Meiosis
Mitosis
Two rounds of division
One round of division

10. # of daughter cells and # of chromosomes:
Meiosis
Mitosis
4 haploid cells
Reduces to 23 chromosomes
2 diploid cells
46 chromosomes

11. Stages Involved Interphase
Meiosis
Mitosis
Interphase
Meiosis I
Prophase I
Metaphase I
Anaphase I
Telophase I
Meiosis II
Prophase II
Metaphase II
Anaphase II
Telophase II
Interphase
Prophase
Metaphase
Anaphase
Telophase
Each round of division ends with cytokinesis!

12. Rounds of Cytokinesis …
Meiosis
Mitosis
Two rounds
One round

13. Process creates: 4 haploid gametes that are genetically unique
Meiosis
Mitosis
4 haploid gametes that are genetically unique
2 diploid somatic cells that are genetically identical

15. Table Talk Venn Diagram
Using the neon markers ONLY, complete the diagram on the table comparing meiosis and mitosis. Once you have been checked by Ms Beck, copy the correct answers into your sheet. Then, complete the back side of the worksheet. C: level 2 voice H: ask your teammates, then raise your hand A: complete venn diagram and activity M: remain at your table, walking around will result in a strike! P: complete venn diagram on table with team then your own sheet

16. -Starts with one cell
-Starts with interphase
-DNA is replicated
-Cytokinesis is involved
Ends with 4 cells
Produce haploid cells
Homologous chromosomes separate first
Makes gametes
Ending human cells have 23 chromosomes
End cells are genetically unique
Makes somatic cells
Ends with cells identical to original
Produces diploid cells
Ends with two cells
Ending human cells have 46 chromosomes
Sister chromatids separate first

17. Comparing Mitosis and Meiosis: Pencil Talk
Work on the Meiosis worksheet in small groups, place pencils in the cup until all the questions have been discussed (13 min) then take pencil and write the answers
C: level 2 voice
H: Ask three of your classmates around you before me
A: worksheet comparing Mitosis vs Meiosis and asexual vs sexual reproduction
M: Remain seated
P: Work with small group to discuss, then write.
SUCCESS

18. Meiosis vs. Mitosis