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Meiosis Day 3,4,5 & Science Fair walk- through. Bellwork 1. Grab a closure from the front basket. Add at least 2 sentences to it to make it more complete.

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Presentation on theme: "Meiosis Day 3,4,5 & Science Fair walk- through. Bellwork 1. Grab a closure from the front basket. Add at least 2 sentences to it to make it more complete."— Presentation transcript:

1 Meiosis Day 3,4,5 & Science Fair walk- through

2 Bellwork 1. Grab a closure from the front basket. Add at least 2 sentences to it to make it more complete or more correct. 2. Complete this phrase on your bellwork sheet: Meiosis creates _______ cells like _____ and _____. It begins with __ diploid cell and ends with ___ _________ cells. Have out: book, Meiosis notes, and orange worksheet from yesterday

3 Announcements & Purpose Review meiosis Use book to fill in worksheet Quiz on Meiosis Thursday Friday: science fair walk through.

4 Finger Meiosis = 2 (chromatid) chromsomes in each cell Hold up 1 pointer finger= this is chromosome 1 from your dad.  Hold up other pointer finger= this is chromosome 1 from your mom =homologous chromosomes  Have them replicate (hold up middle fingers too)  Recombination (mingle them together)  Meiosis 1: Pull hands apart  Meiosis 2: pull fingers apart = 1 chromatid chromosome in each cell

5 9. 9.Meiosis Sexual Reproduction Asexual Reproduction Chromatid Chromosome Genetic Recombination Fertilization Independent Assortment Write Down… ALL THE Key Terms! 1.Prophase I 2.Metaphase I 3.Anaphase I 4.Telophase I 5.Prophase II 6.Metaphase II 7.Anaphase II 8.Telophase II 17.Ploidy 18.Haploid (n) 19.Diploid (2n) 20.Tetrad 21.Homologous Pair 22.Crossing Over 23.Somatic Cell 24.Germ Cell 25.Gamete 26.Zygote nb - You have to actually define them to get credit at the end of the unit

6 SLATE REVIEW  - Have out worksheets/notes

7 The merging of an egg and a sperm is known as:  A) a zygote  B) a gamete  C) a tetrad  D) a somatic cell

8  Haploid (1n) or diploid, (2n)  metaphase I,  metaphase II,  anaphase I,  telophase I

9 An egg cell is an example of  A) a zygote  B) a gamete  C) a tetrad  D) a somatic cell

10  During ‘crossing over’…  A) genes are lost or deleted  B) some genes may move to a homologous chromosome  C) homologous pairs may leave the cell  D) chromosomes will be in Metaphase II

11  Haploid (1n) or diploid, (2n)  metaphase I,  metaphase II,  anaphase I,  telophase I

12 In your body, your skin cells are:  A) somatic  B) a 1n gamete  C) a 2n gamete  D) a gamete

13 In asexual reproduction, the offspring are:  A) Unique from each other  B) Identical to the parents  C)Unique from their parents  D) Half as many chromatids

14  When homologous chromosomes line up:  A. Male/female chromosomes will randomly be on either side  B. The paternal chromosomes will be on the left  C. Maternal chromosomes will be on the right  D. homologous chromosomes don’t line up

15 Metaphase I

16 METAPHASE 1 ANAPHASE 1

17 (choose all that apply) A sperm cell is:  A) always diploid  B) always haploid  C) always a gamete  D) half the genetic info. of it’s parent

18

19 P Use book to fill in front side of worksheet Check:  Did you label INTERPHASE & does it have original # of chromatids before replication?  How many chromatids did you start out with?  Your final number should be half of that  If you copied book directly you should start with 4 original chromatids.

20 Using book, Define the following vocab on the back of your white Meiosis notetaker *Chromatid: is one copy of a duplicated chromosome DiploidHaploidGamete *Zygote: the initial cell formed when two gamete cells are joined by means of sexual reproduction. Tetrad *Somatic Cell: ‘normal’ body cell Homologous pairs:

21 Announcements & Purpose Friday: science fair walk through. Meiosis exam: MONDAY

22 At top of page in small writing: Materials:  -white board to be drawn on (cells, spindle fibers)  -chalk= represents centriole  -lengths of 8 beads= chromatid Chromosome #Mom’s ColorDad’s color 1REDYELLOW 2WHITEGREEN

23  mMaterials:  -white board to be drawn on (cells, spindle fibers)  -chalk= represents centriole/centrisome  -lengths of 8 beads= chromatid MEIOSIS w/ beads! Chromosome #Mom’s ColorDad’s color 1REDYELLOW 2WHITEGREEN Create: Meiosis drawing Label: homologous chromosomes Chromosome # and from mom/dad, (in at least 2 phases) & crossing over Option 1: draw & label each step Option 2: take cellphone photos, it to yourself at school/ print out and label

24 Bellwork 1.What are ‘homologous pairs of chromosomes’? Draw an example 2.What is a somatic cell? How does it differ from a gamete? 3.What is the final product of meiosis? 4.What is your favorite thing you did this weekend?

25 Announcements & Purpose Review meiosis -Go over Meiosis Bead activity -Slate review -Create a quiz -Group slate review (USING QUIZ) Quiz on Meiosis TOMORROW

26 Check your Meiosis Bead activity  -Fill in names of each step  *Check that your drawing is correct Holepunch and put in binder at front.

27 INTERPHASE

28 PROPHASE Crossing over occurs Tetrad= 2 homologous chromosome sets: 4 chromatids

29 METAPHASE 1 ANAPHASE 1

30 TELOPHASE 1CYTOKINESIS

31 PROPHASE1IMETAPHASE II

32 ANAPHASE IITELEPHASE II & CYTOKINESIS

33  Meiosis I splits the diploid cell into two haploid cells, which in turn go through meiosis II to produce a total of 4 haploid genetically-different cells. Meiosis II is very similar to mitosis, except that in meiosis II the nuclei start out as haploid. The reason it is haploid after meiosis I is because each cell has one chromosome set. two sister chromatids still connected at the kinetochore (a dyad) is equivalent to one chromosome. they aren't individual chromosomes until they split during meiosis II.

34 PROPHASE Crossing over occurs Tetrad= 2 homologous chromosome sets: 4 chromatids =2n 2 identical chromatid= 1 chromosome 2 identical chromatid= 1 chromosome

35 TELOPHASE 1CYTOKINESIS Tetrad= 2 homologous chromosome sets: 4 chromatids =1n Tetrad= 2 homologous chromosome sets: 4 chromatids =1n

36 SLATE REVIEW  - Have out worksheets/notes

37 The merging of an egg and a sperm is known as:  A) a zygote  B) a gamete  C) a tetrad  D) a somatic cell

38  Haploid (1n) or diploid, (2n)  metaphase I,  metaphase II,  anaphase I,  telophase I

39 An egg cell is an example of  A) a zygote  B) a gamete  C) a tetrad  D) a somatic cell

40  During ‘crossing over’…  A) genes are lost or deleted  B) some genes may move to a homologous chromosome  C) homologous pairs may leave the cell  D) chromosomes will be in Metaphase II

41 Telophase II

42  Haploid (1n) or diploid, (2n)  metaphase I,  metaphase II,  anaphase I,  telophase I

43 In your body, your skin cells are:  A) somatic  B) a 1n gamete  C) a 2n gamete  D) a gamete

44 In asexual reproduction, the offspring are:  A) Unique from each other  B) Identical to the parents  C)Unique from their parents  D) Half as many chromatids

45 Anaphase II

46  When homologous chromosomes line up:  A. Male/female chromosomes will randomly be on either side  B. The paternal chromosomes will be on the left  C. Maternal chromosomes will be on the right  D. homologous chromosomes don’t line up

47 Metaphase II

48 METAPHASE 1

49 ANAPHASE 1

50 Metaphase I

51 What is a tetrad? Homologous chromosomes that pair up in a set during prophase 1

52 End of: Meiosis 1 or Meiosis II?

53 (choose all that apply) A sperm cell is:  A) always diploid  B) always haploid  C) always a gamete  D) half the genetic info. of it’s parent

54 Anaphase I _____________ _____________ occurs creating _____combinations! Independent Assortment new

55  At the end of Telophase I, there are:  A) 4 haploid daughter cells  B) 2 haploid daughter cells  C) 4 diploid daughter cells  D) 2 diploid daughter cells

56  At the end of Telophase II, there are:  A) 4 haploid daughter cells  B) 2 haploid daughter cells  C) 4 diploid daughter cells  D) 2 diploid daughter cells

57 Meiosis quiz 1. Create a 10 question quiz (with answers on the back) Include at least 2 drawing questions (a drawing of a phase and ask them to label it) Include the following vocab: -Somatic -Sexual reproduction -Asexual reproduction -Crossing over -Gamete -Homologous chromosomes -Diploid -Haploid

58 Bellwork After stamp switch quiz with a partner or group mate and answer the questions, then fill in the following on your bellwork: 1.Choose the most difficult question and write why it was difficult. 2. Choose the most simple question and write why it was simple. 3. Why is creating a quiz a valid way to study for an exam?

59 Announcements & Purpose Review meiosis Use book to fill in worksheet Quiz on Meiosis Thursday Friday: science fair walk through.

60 Whoa-no-mei-oh-sis. Kt8&feature=player_embedded Kt8&feature=player_embedded

61 Genetics- what do you know?

62 Closure


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