monday 11/9/2015 agenda: cell cycle and division!
DESCRIPTION
Tuesday 11/10/2015 Agenda: Cell Cycle and Division! Activity: Meiosis Reading Guide Homework: Meiosis Reading Guide due Thursday/Friday 11/12-11/13/2015 for 40 Points NO SCHOOL ON WEDNESDAY!TRANSCRIPT
![Page 1: Monday 11/9/2015 Agenda: Cell Cycle and Division!](https://reader036.vdocument.in/reader036/viewer/2022062401/5a4d1b4b7f8b9ab0599a5a04/html5/thumbnails/1.jpg)
Monday 11/9/2015Agenda: Cell Cycle and Division!
Activity: Finish Mitosis Packet
Activity: Cell Cycle Quest!!
Homework:
No Homework Tonight!
https://www.youtube.com/watch?v=ZEwddr9ho-4
![Page 2: Monday 11/9/2015 Agenda: Cell Cycle and Division!](https://reader036.vdocument.in/reader036/viewer/2022062401/5a4d1b4b7f8b9ab0599a5a04/html5/thumbnails/2.jpg)
Tuesday 11/10/2015Agenda: Cell Cycle and Division!
Activity: Meiosis Reading Guide
Homework:
Meiosis Reading Guide due Thursday/Friday 11/12-11/13/2015 for 40 Points
NO SCHOOL ON WEDNESDAY!
![Page 3: Monday 11/9/2015 Agenda: Cell Cycle and Division!](https://reader036.vdocument.in/reader036/viewer/2022062401/5a4d1b4b7f8b9ab0599a5a04/html5/thumbnails/3.jpg)
Meiosis Reading Guide • You are to annotate each paragraph 4 times
(there are 4 total paragraphs)
• Answer questions 1-18 on the worksheet
• This is due TODAY for 40 Points!!
![Page 4: Monday 11/9/2015 Agenda: Cell Cycle and Division!](https://reader036.vdocument.in/reader036/viewer/2022062401/5a4d1b4b7f8b9ab0599a5a04/html5/thumbnails/4.jpg)
Thursday/Friday 11/12-11/13/2015
Agenda: Cell Cycle and Division!
Notes: Meiosis and Meiosis Terminology
Activity: Meiosis Foldable
Activity: Amoeba Sisters with Worksheet
Homework:
No Homework!
![Page 5: Monday 11/9/2015 Agenda: Cell Cycle and Division!](https://reader036.vdocument.in/reader036/viewer/2022062401/5a4d1b4b7f8b9ab0599a5a04/html5/thumbnails/5.jpg)
MEIOSISQ2 WK3 D2
![Page 6: Monday 11/9/2015 Agenda: Cell Cycle and Division!](https://reader036.vdocument.in/reader036/viewer/2022062401/5a4d1b4b7f8b9ab0599a5a04/html5/thumbnails/6.jpg)
Meiosis
Meiosis is the type of cell division by which germ cells (eggs and sperm) are
produced.
One parent cell produces four daughter cells.
Daughter cells have half the number of chromosomes found in the parent cell
![Page 7: Monday 11/9/2015 Agenda: Cell Cycle and Division!](https://reader036.vdocument.in/reader036/viewer/2022062401/5a4d1b4b7f8b9ab0599a5a04/html5/thumbnails/7.jpg)
MeiosisDuring meiosis, DNA replicates
once, but the nucleus divides twice.
There are 2 parts to Meiosis:1. Meiosis 12. Meiosis 2
The 4 new daughter cells have variation of the parent DNA; this is genetic variation
![Page 8: Monday 11/9/2015 Agenda: Cell Cycle and Division!](https://reader036.vdocument.in/reader036/viewer/2022062401/5a4d1b4b7f8b9ab0599a5a04/html5/thumbnails/8.jpg)
Meiosis Terminology• Karyotype: Arranging of chromosomes from largest
to smallest; pairing up the homologous chromosomes• Autosomes: All non-sex chromosomes; (#1-22 for
humans)• Sex Chromosomes: Chromosomes that determine
the sex of an organism (#23 for humans)• Set (n): # of different chromosomes. REMEMBER:
Haploid = 1set, Diploid= 2 sets
![Page 9: Monday 11/9/2015 Agenda: Cell Cycle and Division!](https://reader036.vdocument.in/reader036/viewer/2022062401/5a4d1b4b7f8b9ab0599a5a04/html5/thumbnails/9.jpg)
Karyotype of a human• Is this person male or
female?
• How many sex chromosomes are present?
• How many autosome chromosomes are present?
• How many homologous pairs of chromosomes are present?
![Page 10: Monday 11/9/2015 Agenda: Cell Cycle and Division!](https://reader036.vdocument.in/reader036/viewer/2022062401/5a4d1b4b7f8b9ab0599a5a04/html5/thumbnails/10.jpg)
Background on Meiosis• Meiosis involves 2 divisions of the nucleus
• Meiosis 1 & Meiosis 2
Meiosis STARTS with HOMOLOGOUS CHROMOSOMES
Homologous Chromosomes: They are similar in shape, size & genetic content
![Page 11: Monday 11/9/2015 Agenda: Cell Cycle and Division!](https://reader036.vdocument.in/reader036/viewer/2022062401/5a4d1b4b7f8b9ab0599a5a04/html5/thumbnails/11.jpg)
Meiosis 1: 1st Division of Meiosis• Prophase I: Chromosomes
condense, nuclear envelope breaks, homologous chromosomes pair at ends.
• ***Cross-Over: Part of chromatid on 1 homologous chromosome exchanges with the other chromosome***
DRAW ME THIS IS
GENETIC VARIATION
![Page 12: Monday 11/9/2015 Agenda: Cell Cycle and Division!](https://reader036.vdocument.in/reader036/viewer/2022062401/5a4d1b4b7f8b9ab0599a5a04/html5/thumbnails/12.jpg)
Meiosis 1: 1st Division of Meiosis• Metaphase I: Homologous chromosomes move to center of the cell by the spindle fibers.
• Anaphase I: Homologous chromosomes separate and move to opposite poles, BUT sister chromatids stay together. A set of chromosomes moves to each pole
• Telophase I: The spindle fibers disappear, cells begin to cleave; still, two sets of chromosomes are at opposite poles
![Page 14: Monday 11/9/2015 Agenda: Cell Cycle and Division!](https://reader036.vdocument.in/reader036/viewer/2022062401/5a4d1b4b7f8b9ab0599a5a04/html5/thumbnails/14.jpg)
End of Meiosis I
• Once Meiosis I is complete, cytokinesis occurs and the cell splits into 2 haploid cells. These 2 cells enter Meiosis II
![Page 15: Monday 11/9/2015 Agenda: Cell Cycle and Division!](https://reader036.vdocument.in/reader036/viewer/2022062401/5a4d1b4b7f8b9ab0599a5a04/html5/thumbnails/15.jpg)
Meiosis II• Prophase II: A new spindle forms around the
chromosomes (no longer HOMOLOGOUS CHROMOSOMES)
• Metaphase II: Chromosomes line up at center & spindle fibers attach to centromere
• Anaphase II: Centromeres split, chromatids move to opposite poles of cell
• Telophase II: Nuclear envelope forms around each set of chromosomes & spindles retracts, cell begins cytokinesis
![Page 16: Monday 11/9/2015 Agenda: Cell Cycle and Division!](https://reader036.vdocument.in/reader036/viewer/2022062401/5a4d1b4b7f8b9ab0599a5a04/html5/thumbnails/16.jpg)
Result of Meiosis II• 4 HAPLOID cells form as a result of Meiosis II
• Haploid = cell containing 1 set of chromosomes
![Page 17: Monday 11/9/2015 Agenda: Cell Cycle and Division!](https://reader036.vdocument.in/reader036/viewer/2022062401/5a4d1b4b7f8b9ab0599a5a04/html5/thumbnails/17.jpg)
Meiosis II: 2nd division of Meiosis
![Page 18: Monday 11/9/2015 Agenda: Cell Cycle and Division!](https://reader036.vdocument.in/reader036/viewer/2022062401/5a4d1b4b7f8b9ab0599a5a04/html5/thumbnails/18.jpg)
Prophase II
http://everyschool.org/u/logan/cellreproductionx/rogersa/research/meiosis.html
![Page 19: Monday 11/9/2015 Agenda: Cell Cycle and Division!](https://reader036.vdocument.in/reader036/viewer/2022062401/5a4d1b4b7f8b9ab0599a5a04/html5/thumbnails/19.jpg)
Metaphase II
http://everyschool.org/u/logan/cellreproductionx/rogersa/research/meiosis.html
![Page 20: Monday 11/9/2015 Agenda: Cell Cycle and Division!](https://reader036.vdocument.in/reader036/viewer/2022062401/5a4d1b4b7f8b9ab0599a5a04/html5/thumbnails/20.jpg)
Telophase II
http://everyschool.org/u/logan/cellreproductionx/rogersa/research/meiosis.html
![Page 21: Monday 11/9/2015 Agenda: Cell Cycle and Division!](https://reader036.vdocument.in/reader036/viewer/2022062401/5a4d1b4b7f8b9ab0599a5a04/html5/thumbnails/21.jpg)
Differences in Mitosis & Meiosis
• Mitosis• Asexual• Cell divides once• Two daughter cells form• Genetic informationS is
identical
• Meiosis• Sexual• Cell divides twice• Four haploid daughter cells
form• Genetic information is
different