mitosis catalyst how many cells do you think you started out as? why do you think that? if i had...

Mitosis

Catalyst How many cells do you think you started out as? Why do you think that?

If I had a recipe and I wanted to give it to my brother in New York, how could I make sure that both of us have it?

Write in complete sentences!

Don’t talk during the Catalyst!

Agenda

Catalyst HW Review Mitosis – MiTWOsis? BRAIN GAIN Practice EQ

HOMEWORK: Mitosis Worksheet

19. Compare photosynthesis and cellular respiration. (Compare means to “Identify how they are the same.”)

20. Contrast photosynthesis and cellular respiration. (Contrast means to “Identify how they are different.”)

21. Which cellular process produces ATP?22. What would happen if the sun stopped shining

tomorrow? Answer in terms of ATP, photosynthesis, and cellular respiration. (Use these vocabulary words!)

23. Photosynthesis produces glucose, which stores energy. Why is it important that cellular respiration transforms glucose into ATP?

Why do we need the sun?

SUN

SOLAR ENERGY

Glucose

CHEMICAL ENERGY

ATP!

CHEMICAL ENERGY

PHOTOSYNTHESIS CELLULAR RESPIRATION

HW Review

sunlight

photosynthesis

plant

glucose

chemical

cellular respiration

mitochondria

ATP

chemical

Objectives

By the end of today, SWBAT…

Describe the purpose and basic process of mitosis

Explain the role of DNA and chromosomes in mitosis

Getting Big

Key Point #1: Multicellular organisms get bigger because they make more somatic cells.

Two types of cells: Somatic cells = your body cells (like liver, brain, blood, etc.)

Sex cells = sperm and egg cells

Humans are filled with cells like this beaker is filled with Skittles

Cells

CellsCells

Skittles

Skittles

Skittles

Humans grow by getting more cells!

How many cells do

we begin with?

2

How do we get more?

One cell divides into two cells…

…then four, eight, sixteen…

MITOSIS = the process of somatic

cell division.

DNA

Key Point #2: Cells must make an EXACT copy of their DNA before they divide DNA = Deoxyribonucleic acid Cells copy their DNA Then, they divide in half Every generation gets an identical copy of the DNA

Why do cells need to make a copy of their DNA before they divide?

DNA

Key Point #3: Cell DNA is organized into coils called chromosomes. Chromosomes are pieces of coiled DNA. They look like Xs.

2 Legit 2 Quit

In humans, somatic cells have 23 different types of chromosomes

Somatic cells are 2N 2N = two of each typeOne from mommyOne from daddy

Ok…

If we have two copies of each chromosome, how many copies do we have after we duplicate? FOUR!

Using N… 4N!

4N

Notes Reflection (GP)

In your notes, you should be able to find answers FAST! I am going to put up some questions.

Within 30 seconds, should be able to find the answer.

If you do not have the answer in your notes, ADD IT IN!!!

Guided Practice

What is the process of somatic cell division called?

Guided Practice

How do organisms get bigger?

Guided Practice

After mitosis, the two new cells are ___________ to each other.

Guided Practice

How is DNA organized in a cell?

Guided Practice

What is a somatic cell?

Guided Practice

What does a cell do to make sure that DNA is the same from generation to generation?

Guided Practice

How many N does a somatic cell have normally?

Guided Practice

How many N does a somatic cell after the cell duplicates its DNA?

Independent Work Time

Work on the worksheet…

What you do not finish is HOMEWORK!

If you finish early, HONORS WORK!

Photosynthesis p. 203 #1-3, 5; p. 217 #2, 6,

7, 12-14, 16, 23; p. 219 #3 Cellular Respiration +

ATP p. 225 #1; p. 237 #1, 4, 9,

14, 21, 22; p. 234 #1, 4, 7, 8 Cell Growth and Division

p. 241 Begin to read chapter and answer the questions that follow

Key Point Wrap-Up

Key Point #1: Multicellular organisms get bigger because they make more somatic cells.

Key Point #2: Cells must make an EXACT copy of their DNA before they divide

Key Point #3: Cell DNA is organized into coils called chromosomes.

Exit Question

What is a somatic cell?Why is it important that DNA doubles before mitosis?

Write in complete sentences!

Don’t talk during the Exit Question!