1. Cell Reproduction: Chromosomes, Mitosis, Meiosis

2. Review

3. Chromosomes Chromosome Structure Chromatid Centromere Chromatin
Chromatid is

4. Sex Chromosomes
Autosomes

5. Homologous Chromosomes
Karyotype

6. Diploid
Haploid

7. Notice high number of chromosomes in fern compared to humans!

8. Review Questions
Name the proteins that DNA wraps around to form a chromosome in eukaryotic cells.
How do the structure and location of a prokaryotic chromosome differ from that of a eukaryotic chromosome?
Does chromosome number indicate whether an organism is a plant or animal? Explain.

9. Review Questions
4. Contrast sex chromosomes with autosomes. 5. Using Table on slide 10, list the haploid and diploid number of chromosomes for each organism.

10. Organism
Diploid # Chromosomes
Haploid # Chromosomes
Adder’s tongue fern
1262
631
Carrot 18 9
Cat 32 16
Chimpanzee 48 24
Dog 78 39
Earthworm 36
Fruit fly 8 4
Garden pea 20 10
Gorilla
Horse 64
Human 46 23
Lettuce
Orangutan
Sand dollar 52 26

11. Cell Cycle
Interphase
Cell division
Two phases

12. Cell Division
Prokaryotes
Binary fission

13. Cell Division (cont’d)
Eukaryotes
Mitosis
Cytokinesis

14. Control of Cell Division

15. Mitosis
Prophase
Metaphase = Middle

16. Anaphase
Telophase
Animation

17. Mitosis vs Meiosis Where do they occur? Why does it occur? Mitosis

18. Mitosis vs Meiosis End result? MEIOSIS MITOSIS 46 46 23 23 46 46 23 23

19. Meiosis

20. Meiosis I

21. Meiosis II

22. Results of mitosis vs. meiosis

23. Section 8.3
Development of Gametes

24. Why is meiosis important?