1. Mitosis
WALT: To understand how cells divide by a process
called mitosis which results in two daughter cells being
produced.
WILF:
~ State a definition for mitosis and what is produced as a
result. (D)
~ Describe how mitosis occurs. (C)
~ Explain when mitosis occurs. (B)
~ Explain the role of mitosis in asexual reproduction. (A/A*)
Keywords
mitosis diploid chromosomes
daughter cells asexual reproduction

2. In human cells, you will
find 46 chromosomes (23
pairs)
 Diploid number
To make more body cells, these cells
must divide, a process called mitosis.

3. Parent
cell
Daughter
cells

4. Why?
For growth
For repair

5. Mitosis and cancer

6. Keywords
Nucleus
Chromosomes
Diploid
DNA replication
Parent cell
Daughter cell
Questions
1. What is a diploid cell and how
many chromosomes does a
human diploid cell have?
2. Explain why mitosis must occur.
3. Define asexual reproduction
and name examples of when
this happens.

7. Meiosis
WALT: To understand how sex cells (gametes) are
produced by another type of cell division, meiosis.
WILF:
~ State a definition for meiosis and gametes. (D)
~ Describe how meiosis occurs. (C)
~ Explain differences between mitosis and meiosis. (B)
~ Explain the importance of meiosis in relation to variation.
(A/A*)
Keywords
meiosis haploid gametes
sexual reproduction variation

8. Gametes (Sex cells)
egg cell
haploid
cells
diploid
cell
sperm cell
zygote

9. Sexual reproduction requires sex cells, also known as…
These cells are different to body cells because…
When gametes fuse during fertilisation, they produce a…
Keywords
Gametes
Haploid
Zygote

10. Meiosis
To produce gametes, a different type
of cell division must happen, meiosis.
1st cell divisionseparates the
pair of
chromosomes.
2nd cell
divisionseparates the
copies of each
chromosome.

11. Making gametes-Meiosis
Making gametes-Meiosis
1.
You start off with a ___________ cell, which contains
pairs of _____________.
2. The chromosomes then _____________ (like they do in
mitosis).
3. The __________ cell ___________ now happens, the
pairs of chromosomes separate.
4. The second cell division then happens. This produces
____ ____________ cells. Each cell gets a copy of one
chromosome from each pair.
These 4 cells are known as being _________, as they have
half the amount of chromosomes.
This type of cell division is known as ___________.
1.
Keywords
Chromosomes
Replicate
Meiosis
Haploid
Diploid
First
4
Division
Daughter
Keywords
Chromosomes
Replicate
Meiosis
Haploid
Diploid
First
4
Division
Daughter
You start off with a ___________ cell, which contains
pairs of _____________.
2. The chromosomes then _____________ (like they do in
mitosis).
3. The __________ cell ___________ now happens, the
pairs of chromosomes separate.
4. The second cell division then happens. This produces
____ ____________ cells. Each cell gets a copy of one
chromosome from each pair.
These 4 cells are known as being _________, as they have
half the amount of chromosomes.
This type of cell division is known as ___________.

12. Mitosis vs. meiosis
Mitosis
No. of cell
divisions?
No. of daughter
cells formed?
Diploid or
haploid cells
produced?
Needed for…?
Daughter cells
identical?
Meiosis
Use your notes
on mitosis and
meiosis to fill in
this table of
differences
between the
two processes.

13. Mitosis
Meiosis
Mitosis
Mitosis
No. of cell
divisions?
No. of daughter
cells formed?
Diploid or haploid
cells produced?
Diploid or haploid
cells produced?
Needed for…?
Needed for…?
Daughter cells
identical?
Meiosis
No. of cell
divisions?
No. of daughter
cells formed?
Meiosis
Daughter cells
identical?
Mitosis
Meiosis
No. of cell
divisions?
No. of cell
divisions?
No. of daughter
cells formed?
No. of daughter
cells formed?
Diploid or haploid
cells produced?
Diploid or haploid
cells produced?
Needed for…?
Needed for…?
Daughter cells
identical?
Daughter cells
identical?

14. Mitosis
No. of cell
divisions?
Meiosis
1
Mitosis
No. of cell
divisions?
Meiosis
1
No. of daughter
cells formed?
4
No. of daughter
cells formed?
4
Diploid or haploid
cells produced?
haploid
Diploid or haploid
cells produced?
haploid
Needed for…?
Producing gametes
(sex cells).
Needed for…?
Producing gametes
(sex cells).
Daughter cells
identical?
Yes
Mitosis
No. of cell
divisions?
Daughter cells
identical?
Meiosis
1
Yes
Mitosis
No. of cell
divisions?
Meiosis
1
No. of daughter
cells formed?
4
No. of daughter
cells formed?
4
Diploid or haploid
cells produced?
haploid
Diploid or haploid
cells produced?
haploid
Needed for…?
Producing gametes
(sex cells).
Needed for…?
Producing gametes
(sex cells).
Daughter cells
identical?
Yes
Daughter cells
identical?
Yes