Transcript The Cell Cycle and Mitosis

Warm-Up / EOC Prep
1. Which nutrient would be most helpful for an
athlete immediately before an event?
a. Carbohydrate
b. lipid
c. Protein
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-MetaphaseAnaphase-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
PMAT Hand Signals
P- plump
M- middle
A- apart
T- two
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?