Warm-Up / EOC Prep
1. Which nutrient would be most helpful for an athlete immediately before an event? a. Carbohydrate c. Protein b. lipid d. nucleic acids
2. If a disease results in the thickening of the plasma membrane, what function would be most directly affected?
a. intake of water b. production of proteins c. production of ATP d. storage of lipids

Agenda
 Warm-up
 Mitosis Notes
 PMAT Hand Signals
 CC & Mit WS
 Mit Flashcards
 Clean-up
 Cool-down

Quick review:
1- As a cell grows, does its surface area or volume grow quicker?
2- Why don’t cells just grow larger?
3- What lies inside the nucleus?

NC State Standard 3.02

 In eukaryotic cells, the genetics information that is passed on from one generation to the next is carried by chromosomes.

Cell Cycle
 Chromosomes are made up of
DNA(genetic material) wrapped in proteins and they are found in the nucleus.

 Chromosomes are not visible in most cells except during cell division.
Before cell division occurs, each chromosome is replicated or copied.

 Because of this, each chromosome consists of two identical sister chromatids.

 These chromatids are joined in the middle by the centromere.
When the cell divides, each of the “sister” chromatids separate from each other and one chromatid goes to each of the two new cells.

 Mitosis is the process during cell division in which the nucleus of a cell is divided into two nuclei.

 At the end of mitosis each nucleus has the same number of chromosomes as the original cell

 The products of mitosis are 2 identical daughter cells that are equal in size, have identical copies of chromosomes, and half the cytoplasm and organelles.
For example, if a skin in frogs has 20 chromosomes and it undergoes mitosis, both daughter cells will have 20 chromosomes.

 In mitosis, spindles form out of centrioles and microtubules.
These spindles grab the chromosomes and pull them apart.

 Mitosis has four steps and it is followed by cytokinesis
(division of cytoplasm)

Mitosis

Mitosis
1. Prophase-chromosomes become visible and the spindle forms

Mitosis
2. Metaphasechromosomes move to the center of the cell and line up along the equator

Mitosis
3. Anaphasecentromeres divide and the two chromatids move to opposite poles attached to spindle fibers

Mitosis
4. Telophase-nuclear envelope forms around the chromosomes at each pole, the chromosomes uncoil, and the spindle dissolves

Mitosis

Mitosis
 Mitosis in plants and animals is slightly different. For example, in animal cells the cytoplasm is pinched and separated during cytokinesis and in plants a cell plate forms to separate the cytoplasm.

Mitosis

Mitosis

Mitosis

Mitosis

Mitosis

Mitosis-frog cell

Mitosis

Mitosis

Review
 What are the four stages of mitosis in order?

Review
 Prophase-Metaphase-
Anaphase-Telophase

Review
 The division of the cytoplasm is called…

Review
 cytokinesis

Review
 What stage of mitosis is this?

Review
 Anaphase

 In which stage of mitosis do the chromosomes become visible?

 prophase

 How is cytokinesis different in plant and animal cells?

 Plants form a cell plate, animal cells pinch apart

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Mitosis Flashcards
 Make 4 flashcards (using the little white cards)
 One on side- draw a diagram of each of the 4 phases of mitosis
 On the other side- include a description of what goes on and the name of each phase

Cool-Down
1- How is mitosis related to cell division?
2- How is mitosis organized (4 stages)?
3- What are chromosomes and what do they do during cell division?
4- How is cytokinesis different in plants and animals?