1. Diagram a cell with four chromosomes going through meiosis.

3. Mitosis vs. Meiosis Mitosis Mitosis One division Two divisions
2 diploid daughter cells
Identical to parent cell
Mitosis
Two divisions
4 haploid daughter cells
Genetically different from parent cell

4. Nucleus
chromosomes

5. Get one small, one medium and one large of each color chromosome.
What do the colors represent?
The Beads?

6. Pair up chromatids with same size and color

7. Pair up chromatids with same size and color
What does this represent?
What stage?
Haploid or diploid?

8. Match homologous chromosomes

9. Match homologous chromosomes
What are homologous chromosomes.
Carry the same traits
Each homologous pair has one from each parent

10. Demonstrate crossing over during prophase.

11. Demonstrate crossing over during prophase.

12. Demonstrate metaphase

13. Demonstrate metaphase

14. Demonstrate the first division
Anaphase I and Telophase I

15. Demonstrate the first division
Anaphase I and Telophase I

16. Move your cells through the second division.

17. Move your cells through the second division.

18. How many daughter cells do you have?
Are the daughter cells haploid or diploid?
Are the cells genetically Identical or different from the parent cell?

19. 4
Haploid
Daughter Cells

20. Parent
Cell
Daughter Cells

21. Possible Combinations of chromosomes
What does n represent?
What was our haploid number of chromosomes?
What is the possible number of combinations? 8
In people possible combinations.

22. Sexual Reproduction Combines the genetic material of two organisms.
Introduces new gene combinations in a population.
Leads to genetic Variability in the population.
Gametes produced in meiosis fuse to form a zygote.
Gamete-reproductive cell that contains the haploid set of chromosomes…..sperm and egg
Zygote- Cell formed from fusion of gametes that contains the diploid set of chromosomes.

23. Sexual Reproduction Methods
External Fertilization: the eggs are fertilized outside of the body
Internal Fertilization: the eggs are fertilized within the female reproductive tract
Conjugation: cells exchange genetic material
Prokaryotes

24. Asexual Reproduction Offspring arise from a single parent.
Offspring genetically identical to parent.
More likely to inherit mutations.
Leads to less diversity.
Mitosis

25. Asexual Reproduction Methods
Budding
offspring grows out of the body
of the parent.
Spores
a reproductive cell capable
of developing into a new individual
without fusion with
another reproductive cell.
Fission
separation of the body into
two new bodies

26. Quiz
Compare and contrast sexual and asexual reproduction.