1. Meiosis Graphic Organizer
For this Activity You will Need:
Blue Colored Pencil
Red Colored Pencil
Lead Pencil

2. Why is Meiosis Important?
Sperm = 23 chromosomes
Egg = 23 chromosomes
Zygote = 46 chromosomes
Fertilization
MITOSIS

3. Goal of Meiosis
THINK! – What is the goal of meiosis? Fill the answer into the box on your graphic organizer.
To create 4 sex cells (sperm or egg) each with HALF the number of DNA molecules (chromosomes) as the original cell

4. Interphase I
DNA Replicates (doubles)

5. Prophase I Let’s say the normal chromosome # is 4…
Chromosome pairs match up
(1 from mom & 1 from dad)

6. Metaphase I
Chromosome pairs line up in the middle of the cell

7. Anaphase I
Chromosome pairs split.
NO centromere breaking!

8. Telophase I
Cells TEAR!

9. Cytokinesis I
Cells split apart into two!

10. Interphase II NO DNA Replication
(no doubling as must reduce the chromosome # in half)

11. Prophase II
Duplicated chromosomes appear.

12. Metaphase II
Duplicated Chromosomes line up in the middle of the cells

13. Anaphase II
Duplicated Chromosomes split.
Centromeres break.

14. Telophase II
Cells TEAR!

15. Cytokinesis II 2 2 2 2
Cells Split into 4 Sex Cells

16. Meiosis Video Clips United Streaming Video Clip: Meiosis (3:48)
Meiosis Animation_Glencoe
Pay attention to these video clips to see meiosis in action.