1. Meiosis Phases

2. Before Meiosis I - Interphase
Each chromosome is replicated and each chromosome pairs up with its homolog = tetrad
homologous chromosomes = tetrad
Sister chromatids

3. Prophase I: Homologous chromosomes pair and cross over
Nuclear membrane disappears
Centrioles appear and begin to form spindle fibers .

4. Metaphase I:
Chromosomes line up at the center of the cell paired with their homolog
Spindle fibers attach to the centromere .

5. Anaphase I
The spindle fibers pull the homologous chromosomes toward opposite ends of the cells
Notice the results of ‘crossing over’ .

6. Telophase I / Cytokinesis:
Nuclear membranes form and the cell separates into 2 daughter cells
Each daughter cell contains only one chromosome of the homologous pair
Cells are now haploid .

7. Between Telophase I and Prophase II, the DNA is NOT replicated again: the cell goes into meiosis II

8. Prophase II:
Nuclear envelopes dissolve, and spindle fibers reform

9. Metaphase II:
Chromosomes line up at the center of the cell

10. Anaphase II:
The sister chromatids separate and move towards opposite ends / poles of the cell

11. Telophase II / Cytokinesis:
Cell division is complete
One parent cell has produced four haploid daughter cells