1. Meiosis and Sexual Reproduction
Chapter 7

2. Meiosis Formation of gametes
The process of cutting chromosome number in half
2 Divisions
Reduction
Production

3. Let’s Make a Gamete : 1. Prophase 1
Chromosomes become visible
Nucleus breaks down

4. Prophase 1: Crossing Over
Crossing over occurs
Portions of a chromatid on one homologous chromosome are broken and exchanged with the corresponding portions on the other homologous chromosome

5. Creates Genetic Diversity !!!!!!
Survial of a species

6. Metaphase 1
Pairs of chromosomes move to middle of the cell

7. AnaPhase 1
Homologous pairs move to opposite ends of the cell

8. Telophase 1 and cytokinesis
Chomosomes move to end of cell
Cytoplasm divides
Chromosome number cut in half!!!!!!!

9. Division 2
Meiosis

10. Prophase II
Happens in both cell at the same time
A new spindle forms

11. Metaphase II
Chromosomes line up at the equator

12. Anaphase II Centromeres divide
Chromosomes move to opposite ends of cells

13. End of Meiosis

14. Telephase II Nuclear membrane reappears Cytokinesis Result: ?
4 Haploid Gametes
Egg (ovum)
Sperm

15. Meiosis Animation

16. White Boarding

17. Name this phase?

18. Name this phase?

19. Phase? Haploid or diploid

20. Phase?