1. Do Now What is the purpose of mitosis?
2. How many daughter cells are created after mitotic cell division?
3. What type of reproduction is mitosis?
4. What type of cells undergo mitosis?

2. U5-1
15 minutes

4. CFU Check for Understanding
“I don’t know” is NOT an acceptable response in this class!! INSTEAD What did you mean by… How did you… Why is it that… Can you explain… What are some other examples of… What is the difference between…

5. Objective Check
Compare and contrast asexual and sexual reproduction 1 minute to think 2 minutes to talk

6. unique
ZYGOTE

9. How many chromosomes?! n
(23) n
(23)

10. somatic 46
sperm egg 23 n
(23) n
(23)

11. CFU
“I don’t know” is NOT an acceptable response in this class!! INSTEAD What did you mean by… How did you… Why is it that… Can you explain… What are some other examples of… What is the difference between…

12. Sexual life cycle (2n) mitosis fertilization (n) (2n) meiosis mitosis

14. Sexual
growth 2n
identical
gametes 1
YES
gametes

15. Mitosis Vs. Meiosis

17. Meiosis Animation

18. CFU
“I don’t know” is NOT an acceptable response in this class!! INSTEAD What did you mean by… How did you… Why is it that… Can you explain… What are some other examples of… What is the difference between…

19. Independent Practice
Mitosis & Meiosis
7 min.

20. Exit ticket
1. What type of reproduction is meiosis? 2. What types of cells are haploid? 3. What are 2 types of gametes? 4. Name two differences between mitosis and meiosis.

21. Key Points for Today
Asexual or sexual? Changes in chromosome #? # cell divisions? # cells produced?

22. Do Now
What does haploid mean? Give an example of a cell that is haploid.
Give an example of a cell that is diploid.
What is a zygote? How is it formed?
What are processes A & B in the picture below?

23. Meiosis Cut Out Activity
Use your textbook pages
Cut out each phase of meiosis (8 phases total)
Label each phase Do not worry about Interphase I
Provide a brief explanation of what is happening in each phase

24. PUT ALL BOOK BAGS UNDERNEATH TABLES!!!! IN COMPLETE SENTENCES…..
DO NOW
PUT ALL BOOK BAGS UNDERNEATH TABLES!!!!
IN COMPLETE SENTENCES…..
Compare and contrast asexual and sexual reproduction.
What is a gamete? Give an example.
3. Define diploid.

25. Genetic Variation
U4-16
AKA: why you don’t look exactly like your mom or exactly like your dad!

26. Homologous Chromosomes
A pair of chromosomes, one from mom and one from dad, each has the same genes!
Separates during first division, 2n  n

27. Exchanging genes between homologous chromosomes
differences
Exchanging genes between homologous chromosomes
A mix of genes gets passed on

28. CFU
“I don’t know” is NOT an acceptable response in this class!! INSTEAD What did you mean by… How did you… Why is it that… Can you explain… What are some other examples of… What is the difference between…

29. Objective Check
How does crossing over cause genetic variety? 1 minute to think 2 minutes to talk

30. Changes in a DNA sequence Good, bad, or neutral mutations
Sickle Cell Disease

31. Objective Check
How do gene mutations lead to genetic variety? 1 minute to think 2 minutes to talk

32. Chromosomes fail to completely separate
Extra chromosomes
(ex: Down Syndrome)
Chromosomes fail to completely separate
The union of male and female gametes to form a zygote
Makes completely UNIQUE organisms

33. Objective Check
How do non-disjunction, fertilization, and pollination lead to genetic variety? 1 minute to think 2 minutes to talk

34. CFU
“I don’t know” is NOT an acceptable response in this class!! INSTEAD What did you mean by… How did you… Why is it that… Can you explain… What are some other examples of… What is the difference between…

35. Nondisjuction & Klinefelter Syndrome

37. Independent Assortment
Alleles of different genes separate independently of each other
Bb – moms brown hair
When makes eggs via meiosis…
One egg gets b, another egg gets B

38. Why is independent assortment important?
Greater genetic diversity!

39. Independent Practice
EOC Practice
20 min

40. Exit Ticket 1. What type of reproduction is meiosis?
2. What type of cells are haploid?
3. What are the 2 types of gametes?
Explain in a complete sentence why genetic variation is necessary.
Name 2 sources of genetic variation.