1. Warm Up – put mitosis poster on desk
Copy the Table of Contents and Notes info below into your notebook
Table of Contents
Feb 25th, Meiosis Day 1
Notes
What type of reproduction uses meiosis?
What happens in each step of meiosis?

2. Meiosis Meiosis = needed for sexual reproduction
Requires 2 parents
Offspring contains DNA from both parents
Happens in both plant and animal cells
Also called REDUCTION DIVISION
Because it reduces the number of chromosomes in gametes to ½ the number contained in the parent cell

3. Meiosis Vocabulary
Human body cells have 46 chromosomes each (23 from each parent)
Any cell that contains the full number of chromosomes is called a 2n or diploid cell
*Diploid= 2 copies of each gene
Symbol = 2n
Mitosis makes diploid cells
*Homolog = 2 chromosomes in a pair

4. Meiosis Vocabulary
Gametes : cells that contain half the usual number of chromosomes, 1 chromosome from each pair (also called haploid)
*Human gametes have 23 chromosomes each
Haploid Cell: the type of cell produced during meiosis (1/2 the usual number of chromosomes) – aka gamete
Symbol = 1n

5. Meiosis Vocabulary Egg> gamete females produce
Human Female egg = 23 chromosomes
Sperm> gamete males produce
Human male sperm = 23 chromosomes
Fertilization> when male and female gametes (egg & sperm) combine to become a 2n cell with 46 chromosomes that can grow into new cell

6. 23 chromosomes from mother’s egg + 23 chromosomes from father’s sperm 46 chromosomes total in new offspring

7. Mitosis = Diploid Cell
Meiosis = Haploid Cell

8. Purpose of meiosis:
Sexual reproduction
Create “gametes”

9. Meiosis
Occurs in 2 phases:
Meiosis I
Meiosis II

10. Meiosis I

11. Meiosis I Meiosis I Interphase I Prophase I Metaphase I Anaphase I
Telophase I and Cytokinesis

12. Meiosis I: Interphase I
DNA replicates!
Amount doubles

13. Meiosis I: Prophase I Homologous chromosomes pair up (form tetrad)
Nuclear Membrane disappears
Parts of chromosomes are exchanged through crossing over

14. Meiosis I: Metaphase I
Homologous (paired) chromosomes line up in the middle of the cell

15. Meiosis I: Anaphase I
Spindle Fibers pull homologous chromosomes toward opposite ends of the cell

16. Meiosis I: Telophase I
Fibers pull homologous chromosomes toward opposite ends of the cell

17. Meiosis I: Telophase I & Cytokinesis I
Chromosomes reach ends of cell and nuclear membrane forms
Cytokinesis 1
2 cells form

18. Meiosis II Meiosis II Telophase I and Cytokinesis I Metaphase II
Anaphase II
Telophase II and Cytokinesis
Prophase II

19. Meoisis II
There are now 2 cells doing the same thing

20. Meiosis II: Prophase II
NO INTERPHASE II— chromosomes are NOT replicated
There are 2 copies of each homolog
The copies attach together (condense)
Nuclear membrane breaks down

21. Meiosis II: Metaphase II
Duplicated chromosomes line up at the center of the cell

22. Meiosis II: Anaphase II
Attached copies of each chromosomes (chromatids) separate and pull apart

23. Meiosis II: Telophase II
A new nuclear membrane forms in each cell
The sister chromatids move toward opposite ends of the cells and begin to split

24. Meiosis II: Cytokinesis II
Both cells divide, making 4 haploid cells

25. End of Meoisis: 4 haploid cells

26. HW Quiz Corrections Due Wednesday Worksheet # 1 and 2
Progress Reports Signed

27. Warm Up – Put HW on desk
Read Meiosis Article and answer questions on the back
Do not copy

28. Warm Up Answers B C A D
Only one parent is needed

29. Tickets You can earn a ticket for many things
Completing your work
Following directions
Asking or Answers a good question
Do not ask for a ticket, not every action will get you one

30. Tickets If you get a ticket, write your name on the back
Hold it at your seat until the END OF CLASS
At the end of class, Ms. Stoker will take out your class bag for you to put your tickets in
On Fridays names will be drawn for prizes
All tickets will be thrown away and will start fresh on Monday
Lost tickets or tickets without names = too bad

31. Notebook Table of Contents Feb 26th Meiosis Day 2 Notebook
Identify the purpose of each phase of Meiosis

32. HW Answers Top Row Prophase I Metaphase I Anaphase I Middle Row
Telophase I Prophase II Metaphase II
Bottom Row
Anaphase II Telophase II Cytokinesis II

33. HW Answers Diploid = 2 copies of each chromosome, 46 Total (2N)
Haploid = 1 copy of each chromosomes, 23 total (1N)
2. Gametes are the type of cell made during Meoisis, they have 23 chromosomes each
Males produce sperm, females produce eggs/
3. The number of chromosomes is reduced from 46 to 23, or diploid to haploid
4. Meiosis creates the cells needed for sexual reproduction (gametes)

34. Meiosis Animation
wME&feature=related

35. What is the purpose of meiosis?
What are the 2 parts of meiosis?
A cell with 23 chromosomes is called what?
What happens during Interphase?
What is the longest part of meiosis?
Chromosomes are made up of __________.
What phase is there a tetrad?
What would happen without a crossing over point?
What do tetrads do in metaphase?
What do tetrads do in Anaphase? Where do they go?
What happens in Telophase 1?
What type of cell is made during Cytokinesis 1?
What kind of Chromosomes are there in Metaphase II?
How is anaphase II different from anaphase I?
How many cells are there at the end of Cytokinesis II?
Are they diploid or haploid?
Where does Meoisis happen?

36. Meiosis Day 2 Practice
4.3 Reading Study Guide (use textbook section C)
Meiosos – It’s For Sexual Reproduction
15 Min
15 Min / HW

37. Reading Study B
1A – Body cells contain a full (normal) number of chromosomes, 46
1B – cells that contain half the usual number of chromosomes (23)
2A. A gamete that forms in females
2B. A gamete that forms in males
3A. A special kind of cell division that produces haploid cells / gametes

38. 2. Sperm, One new cell is formed, chromosomes combine
3. End of meiosis I = 2 cells. End of meiosis II = 4 cells 4.
Anaphase I
Telophase I and Cytokinesis

39. 5. Prophase II – 2 chromosome copies
Metaphase II – the cell’s center
Anaphase II – separate and are pulled to opposite poles
Telophase II, Cytokinesis – New nuclear membrane forms, cell divides into 2 daughter cells making 4
6. DNA is not copied during the 2nd cell division is Meiosis, but it is in Mitosis.
Meiosis produces Haploid cells, mitosis produces diploid cells
Cells made by Meiosis contain only half the genetic material from a parent, while cells made in mitosis contain all the genetic material of the parent

40. Homework Meiosis – its for sexual reproduction Handout
Quiz corrections due tomorrow

41. Warm Up Put HW on desk (meiosis its for Sexual Reproduction worksheet)
Warm Up – 4.3 Section Quiz (only front side)
Cross out Extended Response
Read the sentence.
If the statement is true, write true
If it is false, change the underlined word or words to make it true
* Use notes and textbook starting on 117C

42. Warm Up Answers True False – half False – Fertilization
False – only sex cells,
False – not copied

43. Notebook Info Table of Contents Feb 27 Meiosis Day 3 Notes Page
Cell Division Vocabulary Review

44. Chromosomes Definition: part of the cell that contains DNA and genes.
Phases: all phases of
mitosis and meiosis

45. Sister Chromatid
Definition: 2 identical copies of a chromosome connected by a centromere. X shape
Phases:
Prophase I, Prophase II
Metaphase II, Telophase I
Cytokinesis I

46. Homologous Chromosomes
Definition – Chromosome pairs
2 sister chromatid
2 xs
Phases – Interphase I,
Metaphase I, Anaphase I,

47. Tetrad
Definition - a group of four sister chromatids or 2 homologous chromosomes, formed during Prophase 1
Phases – Prophase 1, Metaphase 1

48. Diploid
Definition - a cell that contains two sets of chromosomes, one from each parent
Number of Chromosomes – 46
Made during – Mitosis and sexual reproduction
Symbol – 2N
Other info – most human body cells are diploid

49. Haploid
Definition - a cell has only one set of chromosomes, only has genetic info from 1 parent
Number of chromosomes – 23
Made during - Meiosis
Symbol – 1N
Other info – also called gametes

50. Agenda Finish HW sheet 2. Meiosis Coloring / Poster
Instead of coloring on handout, you must draw or trace the pictures onto your own paper and then follow directions on page
- this will be done tomorrow in class tto

51. HW
Interpreting visuals handout
Cross out # 20

52. Warm Up – put hw on desk
Copy the following sentences into your notebook and fill in the blanks
After Meiosis there are _______cells with ______________ chromosomes each, making them ____________ cells.
Another name for a diploid cell is a _____ cell.
A haploid cell can be called a ____________ or a ___________ cell.

53. Warm Up
Copy the following sentences into your notebook and fill in the blanks
After Meiosis there are 4 cells with 23 chromosomes each, making them HAPLOID cells.
Another name for a diploid cell is a 2N cell.
A haploid cell can be called a GAMETE or a 1N cell.

54. HW Answers 16. 2n cells have 46 chromosomes, 1N cells have 23
17. A - B show Meiosis I, B – C show Meiosis II
18. No, meiosis takes place only in cells in reproductive organs
19. Meiosis is necessary because it produces sex cells. Sex cells are needed to make new offspring
21. Only cells that are to become gametes go through meiosis. All other cells divide by mitosis. During Meiosis a cell goes through 2 cell divisions, during mitosis there is only 1 cell division. 4 daughter cells are produced by Meiosis, they contain half of the chromosomes from the parent. Mitosis makes 2 daughter cells, both have an exact copy of the parent’s chromosomes.

55. Notebook Table of Contents Feb 28th Meiosis Day 4 Notes
Feb 28th Meiosis Day 4 Why don’t I know this yet?

56. Agenda READ textbook 117C – 122C
Write down and answer all “check your reading”
Questions
Write down and answer 1,3.4.6 on 122C
2. Poster
Label phases
Write description
Label diploid or haploid
color

57. Agenda Work on and complete Meiosis Poster started yesterday
Use textbook 121C and notes
*it must have
Phases labeled (10pts)
Key structures identified (20pts)
Description for each phase (20pts)
Labeled diploid or haploid (20)
Homologous chromosomes colored according to directions (20)
Neat, Creative, TITLE (10)
2. What is Meiosis Handout
- Will be given for HW if not started / finished in class

58. Warm Up – copy sentence/statement into notebook and answer
_____________ is the type of asexual reproduction that involves an organism growing a new one off of it’s side.
How many cells are there at the end of Mitosis? Are they diploid or haploid?
How many cells are there at the end of Meiosis? Are they diploid or haploid?

59. BUDDING is the type of asexual reproduction that involves an organism growing a new one off of it’s side.
How many cells are there at the end of Mitosis? Are they diploid or haploid?
2 cells, they are diploid
3. How many cells are there at the end of Meiosis? Are they diploid or haploid?
There are 4 cells, they are haploid

60. Warm Up Make sure you have a pencil
We will begin preparing for Tuesday’s test by taking a “pretest”

61. Agenda
Pretest > determine what you do know and the areas you need help on
Study Guide Packet
Due Monday for a test grade
If finished you get a 100 test grade 

62. Pretest You will have 20 minutes. You may not use notes or the book.
Take this as if it were a regular test.
No talking
Eyes on your own paper
Answer in pencil so that you can correct your mistakes

63. 1. A starfish that looses a limb can grow it back
1. A starfish that looses a limb can grow it back. What type of asexual reproduction is this? __________________________

64. 1. A starfish that looses a limb can grow it back
1. A starfish that looses a limb can grow it back. What type of asexual reproduction is this? __________________________ Answer: Regeneration

65. 2. ______________ creates four haploid cells.

66. 2. ______________ creates four haploid cells. Answer: Meiosis

67. 3. Asexual reproduction in most organisms involve
Mitosis by two parents
Mitosis by one parent
Binary Fission by both parents
Meiosis by one parent

68. 3. Asexual reproduction in most organisms involve
Mitosis by two parents
Mitosis by one parent
Binary Fission by both parents
Meiosis by one parent
Answer: B. Mitosis by one parent

69. 4. Bread yeast reproduce by developing tiny extensions or growths on their bodies. What type of asexual reproduction is this? ______________________

70. 4. Bread yeast reproduce by developing tiny extensions or growths on their bodies. What type of asexual reproduction is this? ______________________ Answer: Budding

71. 5. How many new cells does Mitosis create? __________

72. 5. How many new cells does Mitosis create? __________ Answer: Two

73. 6. How many chromosomes does a diploid cell have? ________

74. 6. How many chromosomes does a diploid cell have? ________ Answer: 46

75. 7. How many new cells does Meiosis create? __________

76. 7. How many new cells does Meiosis create? __________ Answer: Four

77. 8. ______________ creates two diploid cells.

78. 8. ______________ creates two diploid cells. Answer: Mitosis

79. 9. A cell with chromosomes lined up in the middle is most likely in which stage of Mitosis? _________________

80. 9. A cell with chromosomes lined up in the middle is most likely in which stage of Mitosis? _________________ Answer: Metaphase

81. 10. How many chromosomes does a haploid cell have? ________

82. 10. How many chromosomes does a haploid cell have? ________ Answer: 23

83. 11. Which of the following is a true statement?
Cells prepare for Mitosis in prophase
During Mitosis a cell divides twice
Mitosis produces two diploid cells
Meiosis produces two haploid cells.

84. 11. Which of the following is a true statement?
Cells prepare for Mitosis in prophase
During Mitosis a cell divides twice
Mitosis produces two diploid cells
Meiosis produces two haploid cells.
Answer: C

85. 12. During meiosis, how many times does a cell divide? __________

86. 12. During meiosis, how many times does a cell divide
12. During meiosis, how many times does a cell divide? __________ Answer: Two

87. 13. During mitosis, how many times does a cell divide? ___________

88. 13. During mitosis, how many times does a cell divide
13. During mitosis, how many times does a cell divide? ___________ Answer: One

89. 14. A 2n human cell has 46 chromosomes
14. A 2n human cell has 46 chromosomes. How many chromosomes does a male gamete have? ________

90. 14. A 2n human cell has 46 chromosomes
14. A 2n human cell has 46 chromosomes. How many chromosomes does a male gamete have? ________ Answer: 23

91. 15. What are the final products of Meiosis?
Two 1n cells
Two 2n cells
Four 1n cells
Four 2n cells

92. 15. What are the final products of Meiosis?
Two 1n cells
Two 2n cells
Four 1n cells
Four 2n cells
Answer: c

93. 16. The offspring produced during asexual reproduction are
Always larger than their parents
Always smaller than their parents
Genetically identical to their parents
Genetically different from their parents

94. 16. The offspring produced during asexual reproduction are
Always larger than their parents
Always smaller than their parents
Genetically identical to their parents
Genetically different from their parents
Answer: C

95. 17. Write the stages of Mitosis in order.
__________________

96. Prophase Metaphase Anaphase Telophase
17. Write the stages of Mitosis in order.
Prophase
Metaphase
Anaphase
Telophase

97. 18. Write the stages of Meiosis I in order.
__________________

98. Prophase I Metaphase I Anaphase I Telophase I
18. Write the stages of Meiosis I in order.
Prophase I
Metaphase I
Anaphase I
Telophase I

99. 19. Write the stages of Meiosis I in order.
__________________

100. Prophase II Metaphase II Anaphase II Telophase II
19. Write the stages of Meiosis II in order.
Prophase II
Metaphase II
Anaphase II
Telophase II

101. 20. A diploid cell of a chimpanzee contains 48 chromosomes
20. A diploid cell of a chimpanzee contains 48 chromosomes. How many chromosomes are in a haploid cell of a chimpanzee chromosome? ________________

102. 20. A diploid cell of a chimpanzee contains 48 chromosomes
20. A diploid cell of a chimpanzee contains 48 chromosomes. How many chromosomes are in a haploid cell of a chimpanzee chromosome? ________________ Answer: 24

103. 21. Which of the following occurs in Meiosis that does NOT occur in Mitosis?
Body cells are made
Cell division
Gametes are made
Telophase

104. 21. Which of the following occurs in Meiosis that does NOT occur in Mitosis?
Body cells are made
Cell division
Gametes are made
Telophase
Answer: C

105. 22. Identify the stages of Mitosis
__________

106. 22. Identify the stages of Mitosis
Anaphase
Prophase
Metaphase
Telophase

107. 23. Write the letters of the stages in their correct order using the picture.
________________

108. 23. Write the letters of the stages in their correct order using the picture.
B (Prophase)
C (Metaphase)
A (Anaphase)
D (Telophase)

109. 24. Describe what is happening in each stage.

110. Prophase = Nuclear membrane disappears
24. Describe what is happening in each stage.
Answer:
Prophase = Nuclear membrane disappears
Metaphase = Spinal Fibers attach, chromosomes move to center of cell
Anaphase = Spindal fibers pull chromosomes to opposite sides of the cell
Telophase = nuclear membrane develops and cell divides

111. 25. Describe what happens after the stage labeled D.

112. 25. Describe what happens after the stage labeled D.
Answer:
Cytokenisis, the cell separates into two new identical cells.

113. 26. Which stage of Meiosis is shown in the picture? How do you know?

114. 26. Which stage of Meiosis is shown in the picture? How do you know?
Answer:
Telophase II/ because there are about to be 4 cells

115. 27. Describe three forms of asexual reproduction and give an example of each. In what important way is asexual reproduction different from sexual reproduction?

116. 27. Describe three forms of asexual reproduction and give an example of each. In what important way is asexual reproduction different from sexual reproduction?
Answer:
The three forms of asexual reproduction are budding, binary fission and regeneration.
Budding happens when an organism grows a bud off of itself. The bud eventually becomes its own organism.
In binary fission, a cell splits in 2.
In regeneration lost or broken body parts are regrown.
Asexual reproduction involves 1 parents, while sexual requires 2.

117. 28. Identify where Meiosis occurs and explain why Meiosis is necessary.

118. 28. Identify where Meiosis occurs and explain why Meiosis is necessary.
Answer:
Meiosis occurs in sexual reproductive organs. It is necessary to create egg and sperm cells.

119. Study Guide Due Monday at the start of class
Use notes and pretest answers to complete
Websites on the back will help you study and find answers as well

120. Meiosis Similar to mitosis in SOME ways Division of cells PMAT
DIFFERENT in MANY ways
Involves 2 cell divisions instead of 1
Results in 4 cells with ½ the genetic information (HAPLOID cells) called GAMETES

121. Mitosis vs. Meiosis Practice Mitosis verses Meiosis
Questions about Mitosis and Meiosis

123. Warm Up
Put study guide and Pretest on desk to be checked – any work done before warm up is completed will not count
Complete “Questions about Mitosis and Meiosis” handout – only the front side
- NO NOTES OR TEXTBOOK!

124. Warm Up Answers
Mitosis happens in BODY CELLS. In mitosis, one cell divides to from 2 cells. In mitosis each new cell has exactly the same number of type of chromosomes as the original cell.
Meiosis happens in SEX Cells. In meiosis one cell divides to form 4 cells. In meiosis each new cell has ½ the number of chromosomes as the original.

125. 2. Mitosis
3. Meiosis
Cell Division 3.
Happens in body cells – Mitosis
Happens in sex cell – Meiosis
Results in 4 new cells – Meiosis
Results in 2 new cells – mitosis
Used in growth/development - Mitosis

126. Today’s Agenda Flashcards
Study Guide > complete if not, check answers and correct (ask Ms. Stoker for key)
Extra practice & extra credit
22/
metaphase

127. Flashcards Look at Pretest from Friday
For any pretest question you missed you must create the corresponding flashcard
Everyone must make at least 5, if you didn’t miss 5 make 6, 10, 21, 22, 28
For example, if you missed #2 on the pretest, find #2 in the column marker “pretest question missed” and create that flashcard
Some numbers have more than 1 flashcard to make
*lost pretest = make all flashcards
*before you begin, go through pretest and mark on sheet each flashcard you must make

128. Warm Up
Put study guide on desk to be collected, make sure your name is on it!
Take out flash cards and pretest
Begin studying silently
Silent Alone Studying (10 min)
Partner Studying (8 min)

129. CFA 6 No noise (humming, talking, whispering, tapping)
No cheating – be prepared to show your arms 
#2 pencil
Extra Credit
Tell which phase of Mitosis the following onion cells are in. Answer on multiple choice page