1. Meiosis: A special type of cell division
By: Crystal Carroll

2. WHY IS MEIOSIS IMPORTANT?
Sexual reproduction begins with Meiosis
Zygote grow through Mitosis--resulting in an organism
Evolutionary change
Overview of Meiosis

3. INTERPHASE I
Longest phase
Chromosomes replicate

4. PROPHASE I Homologus chromosomes begin to condense Synapsis occurs
Crossing over occurs

5. METAPHASE I
Tetrads line up
Spindle fibers attach

6. ANAPHASE I
Tetrads separate
Centromeres remain in tact

7. TELOPHASE I Two haploid cells form at each pole
Each chromosome has two sister chromatids

8. CYTOKINESIS Division of the cytoplasm Cleavage furrows form
No further replication of the genetic material

9. INTERKINESIS
Transistion period

10. PROPHASE II
New spindles form
No crossing over

11. METAPHASE II
Chromosomes line up on metaphase plate

12. ANAPHASE II
Centromeres split

13. TELOPHASE II & CYTOKINESIS
Nuclei form
Cytokinesis occurs
Mitosis occurs

14. MEIOSOS IS NOT FLAWLESS
The most common cause of pregnancy failure
Arise from mistakes
During egg formation
More frequent as women age
Gain or loss of whole chromosomes

15. Meiosis