Week #3 Quarter 2 (10/28) Homework:None

To Do Today:

Fact of the Day

Today in Biology

Biology Learning Goal: Overview of chapter 6 – Genes, DNA, Chromosomes and chromatidsWarm Up Question: New Warm up1 what is difference between S and

G1 phase?2.What is a centriole?3. What is a centromere?

1. Collect homework2. Complete mitosis

book3. Quiz

The first Jack O’Lanterns were actually made from turnips.

Halloween is the second highest grossing commercial holiday after Christmas.

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Cell Cycle

Mitosis Flip Book

Overview of Mitosis

G1-phase

S-phase

Mitosis Begins

Week #3 Quarter 2 (10/29) Homework:None

To Do Today:1. Video on mitosis and meiosis

2. Homework turned into Mrs. V

3. Read text and answer ?’s

Fact of the Day

Today in Biology

Biology Learning Goal: Overview of chapter 6 – Genes, DNA, Chromosomes and chromatidsWarm Up Question:1. What is purpose of mitosis?

What do you think is purpose of meiosis?

Samhainophobia is the fear of HalloweenBoston, Massachusetts, holds the record for the most Jack O’Lanterns lit at once

To Do Today Watch video on mitosis and

meiosis

Make sure homework turned in

Read pgs143-149 answer questions 1-5 on pg. 149

Week #3 Quarter 2 (10/30&31) Homework:Have a safe Halloween

To Do Today:Mitosis and meiosis notes and comparison

Fact of the Day

Today in Biology

Biology Learning Goal: Overview of chapter 6 – Genes, DNA, Chromosomes and chromatidsWarm Up Question:

1. Cytokinesis begins in which phase?metaphase, telophase, prophase, anaphase

2. A cell with 10 chromosomes undergoes mitosis. How many daughter cells are created? ___ Each daughter cell has ___ chromosomes. 2, 10 - 10, 2 - 1, 10 - 2, 20

The word “witch” comes from the Old Saxon word “wica”, meaning “wise one.” The earliest witches were respected dealers in charms and medicinal herbs and tellers of fortunes.

1

Mitosis brainpop: http://www.brainpop.com/science/cellularlifeandgenetics/mitosis/

What stage is this?What structure is labeled at x?

Mitosis animation:http://wn.com/Mitosis_Animation#/videoshttp://www.bing.com/videos/search?q=mitosis&view=detail&mid=AB675AF545E7E8CFB87FAB675AF545E7E8CFB87F&first=41

Go to page 10 title

(notebook paper)

3

MEIOSIS I

FOUND ON PAGE 144-145 OF TEXT BOOKMitosis and Meiosis comparison:http://highered.mcgraw-hill.com/olcweb/cgi/pluginpop.cgi?it=swf::535::535::/sites/dl/free/0072437316/120074/bio17.swf::Comparison of Meiosis and Mitosis

MEIOSIS II

FOUND ON PAGE 144-145

3 key contributions to genetic variation

1. Crossing over- chromosomes exchange sections (increases variability)

Meiosis and Genetic VariationPage 10

Meiosis and crossing overhttp://www.bing.com/videos/search?q=meiosis+and+crossing+over&view=detail&mid=AA0DF44A352362CA9F94AA0DF44A352362CA9F94&first=0#view=detail&mid=397D1E7872E2396D6B55397D1E7872E2396D6B55

2. Independent assortment-

http://www.sumanasinc.com/webcontent/animations/content/independentassortment.html

occurs because there are various ways that chromosomes may be aligned in metaphase I of meiosis

Page 10

3. Random fertilization•Any sperm can fuse with any egg.–A zygote produced by mating of a woman and man has a unique genetic identity.–An ovum is one of approximately 8 million possible chromosome combinations (actually 223).–The successful sperm represents one of 8 million different possibilities (actually 223).–The resulting zygote is composed of 1 in 70 trillion (223 x 223) possible combinations of chromosomes.And….Crossing over adds even more variation to this!

Meiosis and gamete formationThe main purpose of meiosis is the formation of gametes-gametogenesis

Meiosis in males:

spermatogenesis- the process of producing sperm with half the number of chromosomes (haploid) as somatic cells.

http://ldysinger.stjohnsem.edu/ThM_599d_Beg/02_Biology/02_spermat-oogen.htm

Back pg 10

How Sperm is made!!IN MALES, take one somatic cell and allow it to go through two divisions of Meiosis I and Meiosis II and you will have 4 viable sperm cells

Back pg 10

13

Meiosis in females

oogenesis- the production of the egg or ovum in the female

Back pg 10

How an Egg is made!!IN FEMALES, take one somatic cell and allow it to go through two divisions of Meiosis I and Meiosis II and you will have 1 very large egg cell

Absorbed back into body as protein

Back Pg10

http://ldysinger.stjohnsem.edu/ThM_599d_Beg/02_Biology/02_spermat-oogen.htm

Mitosis and meiosis comparison summary

handout

Unit 4 Worksheet 1

Meiosis