Transcript Ch32and33_001

Cells and Heredity
CHAPTER 3.2
WARM UP 9/11/09
1.
What are you and every other living thing
made of?
2.
Where do cells come from?
3.
How does a cell know how to function
and reproduce?
3.2 VOCABULARY
cell cycle (p.80) – The normal sequence of
growth, maintenance, and division in a cell.
interphase (p.81) – The period in the cell cycle in
which a cell grows, maintains itself, and
prepares for division.
mitosis (p.81) – The phase in the cell cycle during
which the nucleus divides.
cytokinesis (p.81) – The division of a parent cell’s
cytoplasm following mitosis.
INTERPHASE
1.
2.
Cell grows and carries out normal
functions; organelles duplicate.
DNA replicates
1.
2.
3.
3.
Loose strands of DNA in the cell
DNA wraps around proteins
DNA replicates in the nucleus
Cell grows and prepares for mitosis.
WARM UP 9/14/09
Consider the muscle tissue in your body. What
ingredients and processes formed it? How did
it become a muscle?
PROPHASE
1.
2.
3.
DNA continues to condense as it
wraps around proteins.
Strands of DNA condense to distinct
chromosomes, each with two
chromatids that are exact copies of
each other.
The nuclear membrane disappears.
PROPHASE
METAPHASE
Chromosomes line up in the middle of the cell.
METAPHASE
Bell Work 9/15/09
1.
What are the three stages of the cell cycle?
(please list them in order)
2.
3.
4.
What are the first two stages of mitosis?
What is the name given to the cell that is
preparing for cell division?
What is the name given to the cells after cell
division occurs?
ANAPHASE
1.
2.
Chromatids of each chromosome split into two
separate chromosomes.
Separated chromosomes pull to the opposite
ends of the cell.
ANAPHASE
TELOPHASE
New nuclear membranes form
TELOPHASE
CYTOKINESIS
Cell pinches and divides.
CYTOKINESIS
BELL WORK 9/16/09
List all of the stages of the
cell cycle, including all of
the stages of Mitosis.
Mitosis Model
1. Separate your paper into 6 separate
sections.
2. Make a model for each stage of the cell
cycle, refer to bell work or foladable.
3. Use arrows or numbers to represent the
correct order of the stages.
4. Make an acronym for the stages of the cell
cycle.
5. Be ready to present to the class at 9:15
Bell Work 9/17/09
Why do scientists make
models? Write at least 3
sentences explaining the
importance of models and
about the model you are
making.
Bell Work 9/18/09
1.
Describe how cells prepare for
mitosis.
2.
Explain what happens to cells
after cytokinesis.
Bell Work 9-21-09
1.
How many parents does asexual
reproduction involve?
2.
What is binary fission?
Vocabulary 3.3
Asexual reproduction (Organisms with male and female parts) –
the process by which a single organism produces offspring that
have the same genetic material
Types of Asexual Reproduction:
1. Binary fission- occurs in prokaryotes (boy cells ONLY with male and
female parts) a form of asexual reproduction (which have male
and female parts) by which some single-celled organisms
reproduce. Prokaryotes such as bacteria reproduce by binary
fission which they split in two from the parent cell.
2. Regeneration – in some organisms, the process by which
certain cells produce new tissue growth at the site of a wound
or lost limb; also a form of asexual reproduction. Occurs in starfish
and plants (Girl cells with male and female parts). Part of the organism is cut off
and another organism is reproduced.
3. Budding
both unicellular (boy cells) and
multicellular (girl cells) organisms (male
and female parts).
Organism develops tiny buds on its body
that contain parent’s DNA
The bud grows until it forms a complete or
nearly complete organism genetically
identical to the parent and then breaks off
from the parent
Bell Work 9/22/09
1.
List the 3 types of asexual
reproduction and give an example of
each.
Bell Work 9/23/09
1. Explain the similarities and
differences between asexual and
sexual reproduction. Write at least 3
sentences.
Bell Work 9/24/09
List the 3 things cell division is
involved in and explain each.