Transcript Cell Division - Downers Grove

Cell Division
Everything you need to know- but
were afraid to ask…
Can asexual reproduction
produce a large number of
offspring?
Yes, that is why you get sick so fast!
Bacteria can reproduce every 30
minutes!
Give me an example of
regeneration.
A star fish grows its arm back
A leaf breaks off a plant, someone puts
the stem into water and roots
eventually grow from the stem (cutting).
What does asexual
reproduction in most
organisms involve?
Mitosis by one parent!
As compared to the parent
cell, after mitosis, the number
of chromosomes in a
daughter cells is…
The same as the number in
the parent cell
Why do most multicellular
organisms grow and develop?
Because their cells
continue to divide.
What are the steps of the cell
cycle?
Interphase, mitosis and
cytokinesis
When do cells prepare for cell
division?
interphase
Name the stages of mitosis?
Prophase
Metaphase
Anaphase
Telophase
What happens during
prophase?
Chromosomes condense, each of
which consists of two identical
chromatids held together by a
centromere.
What happens during
metaphase?
The chromosomes line up
in the middle of the cell.
What happens during
anaphase?
Chromatids split and the
chromosomes are pulled to
opposite ends of the cell.
What happens during
telophase?
The chromosomes
uncondense and new
nuclear membranes form.
What are the two parts of a
chromosome?
Centromere and chromatids
What are the names of the
two scienctists who built a
model of DNA in 1953?
Watson and Crick
What does a cell’s genetic
material contain?
instructions for growth and function
What is the shape of DNA?
double helix
How is DNA condensed?
It is wrapped around proteins like a
spool.
Why is cell division important?
It is essntial for growth, development,
and repair.
What makes one organism
larger than another?
The larger organism has more cells
What happens during an
organism’s development?
Cells become specialized
What is the part of a cell’s life
when it is not dividing?
interphase
What is the part of a cell cycle
when the nucleus divides?
mitosis
What do you call the division
of the parent cell’s
cytoplasm?
cytokinesis
What structure in a plant cell
grows between the two new
nuclei after mitosis?
the cell plate
What kind of asexual
reproduction do most singlecelled organisms use?
binary fission
How do some multi-celled
organisms reproduce
asexually? (like sponge bob)
by budding
What process do starfish use
to replace broken body parts?
regeneration
How do plants use
regeneration?
by growing from cuttings
Is the generation time of
bacteria long or short?
short
What is your favorite class?
It better be science!