Mitosis and Meiosis
By Andrew Stone
Period: 2
Life Science Topic
Compare sexual reproduction (offspring
inherit half of their genes from each
parent) with asexual reproduction
(offspring is an identical copy of the parent
cell).
What is Mitosis?
The process by which one copy of a
parent cell’s DNA is copied into each of
the 2 identical daughter cells.
How it happens?
The parent cell’s chromosomes double
and then divide into each of the 2 identical
daughter cells
Stages of Mitosis
Interphase:
Spends most of cell life
in this phase.
Cell prepare for division
in this phase.
Prophase
chromatin condenses into chromosomes.
The nuclear envelope breaks down
spindles form at opposite ends of the cell.
Metaphase
the spindle fully develops and the
chromosomes align at the middle of
spindle fibers
Anaphase
In anaphase, the paired chromosomes separate and
begin moving to opposite ends of the cell. Spindle fibers
not connected to chromatids lengthen and elongate the
cell. At the end of anaphase, each pole contains a
complete set of chromosomes.
Telophase
The cell continues to lengthen.
Nuclei begin to form at opposite ends.
The nuclear envelopes of these nuclei are formed
Nucleoli also reappear.
Chromatin fibers of chromosomes uncoil.
Cytokinesis
During cytokinesis, the cytoplasm of a cell is
physically divided to form two daughter cells
The binding of some molecules or organelles to
the chromosomes or spindle fibers ensures that
each daughter cell will receive a fair share of
components.
Mitosis Links
Mitosis and Cytokinesis
Meiosis Animation
What is Meiosis?
Not to be confused with mitosis
The process by which the number of
chromosomes is reduced by half to form
sex cells (sperm and egg)
Why?
Sex cells have half the chromosomes that
body cells have so that when the sperm
and the egg combine in the zygote, the
zygote will have the right number of
chromosomes.
How?
The double in the parent cell then the
parent cell divides just like in mitosis
except twice to produce 4 sex cells
Stages of Meiosis
The stages of meiosis are similar to
those of mitosis except there are extra
stages for the second division and in
prophase some chromosomes swap
genes
The next slide shows 2 diagrams of the
mechanics of meiosis and the stages of
meiosis
Meiosis Links
Interactive
activity
Meiosis
Matching
Recommended Extra Activities
Read All about Mitosis and Meiosis by
Elizabeth R. C. Cregan
Also, try one of these fun activities…
Paraphased By Andrew Stone
1.Newspaper article – Write an article from the point of view of a person living during the
discoveries of mitosis and meiosis. Answer the “who, what, when, where and why” questions.
Your article must be supported by pictures with captions.
2. Poem or song – Write an original poem or song explaining the steps of mitosis and meiosis.
3. Create a model of both mitosis and meiosis – Demonstrate the steps of mitosis and meiosis
by creating a model of these processes. The model must be accurate, demonstrate knowledge,
and be a creative design. It must be 3D .
4. Write a children’s storybook – Write an original story explaining the steps of mitosis and
meiosis. The story must include all the parts of a story including characters, plot, dialogue,
descriptions and illustrations.
5. Political cartoon – You must create a political cartoon strip showing the steps of mitosis and
meiosis. The cartoon must include colored drawings and captions.
6. Animated FlipBook – You must create a flip book depicting mitosis and meiosis that will show
the stages of each process when flipped. Each page must have a picture (colored), as well as a
description of what is happening. At the end of the book, you must write a comparison and
contrast of the two processes.
Sources: Pebble Brook High School Web Site
Sources
Ask.About.com:Biology
Encyclopedia.com
Picsearch
You Tube
Cells Alive
Clip Art
THE END!