1. Miosis
By,
Cameron Behrendt

2. Interphase
• Centriole pairs also replicate.
• Similar to mitosis Interphase
• Each Duplicated chromosome Consist of two
identical sister chromatids attached at their
centromeres
• Nucleus and nucleolus are visible.
● Chromosomes Replicate (S Phase)

3. Interphase (Continued)

4. Prophase I
• Longest and most complex phase (90%).
• Chromosomes Condense
● Synapsis Occurs: Homologous
chromosomes come together to form a
tetrad.• Tetrad is two chromosomes or four
chromatids (sister and nonsister chromatids)

5. Prophase I - Synapsis
Homologous Chromosomes

6. Metaphase I
• Shortest Phase
• Tetrads align on the metaphase plate.
• INDEPENDENT ASSORTMENT OCCURS:
1. Orientation of homologous pair to poles is
random.
2. Variation
3. Formula: 2n
Example: 2n=4
Then n=2
Thus 2²=4 Combinations

7. Metaphase I

8. Anaphase I
• Homologous chromosomes seoerate and
move towards the poles
• Sister chromatids remain attached at the
centromeres.

9. Anaphase I

10. Telophase I
• Each pole now has haploid set of
chromosomes
• Cytokinesis occurs and two haploid daughter
cells are formed.

11. Telophase I

12. Prophase II
Same as prophase in mitosis

13. Metaphase II
Same as metaphase in mitosis

14. Anaphase II
• Same as anaphase in mitosis
• Sister chromatids seperate

15. Telophase II
• Same as telophase in mitosis
• Nuclei form
• Cytokinesis occurs
• Remember: Four haploid daughter cells
produced
Gametes = Sperm or egg

16. Telophase II

17. Cytokinesis

18. Centrioles

19. Centromere

20. Homologous Chromosomes

21. Spindle Fibers

22. Sister Chromatids

23. Nuclear Membrane

24. Cell Membrane