1. Learning Objectives:
1. Explain how gametes are made by meiosis
2. Describe differences and similarities
between mitosis and meiosis
Starter
Draw and label a sperm and egg cell in your
book – don’t look back in your book! 
Saturday 8 June 2013
Activity1:Meiosis

2. Meiosis
• A special type of cell division producing
gametes
• Happens in sex organs
– Ovaries and testes
• Gametes contain half the number of
chromosomes. This is called haploid
• Meiosis results in variation

3. Stages of meiosis

4. 2 Main stages
1. Homologous chromosomes separated.
Creates 2 daughter nuclei
2. 2 daughter nuclei divide. Chromosomes
themselves are seperated. Creates 4
gametes.

5. Activity
• Using pipe cleaners (4 different
colours) OR string – model the stages of
meiosis
• Do this in your book.
• Label your diagrams

6. Similarities and differences
between meiosis and mitosis
• Use pages 29 and 27 to create a table
showing the similarities and differences
of meiosis and mitosis.
Mitosis Meiosis
Where does it occur
Number of divisions
Creates
Number of chromosomes
Produces
Function

7. Similarities and differences
between meiosis and mitosis
Mitosis Meiosis
Where does it occur
Number of divisions
Creates
Number of
chromosomes
Produces
Function

8. To finish off..
Unscramble these keywords.
The person who finishes first can go first
today!

9. Characteristics of authentic activities
7. Authentic activities can be integrated
and applied across different subject
areas and lead beyond domain-specific
outcomes.
Activities encourage interdisciplinary
perspectives and enable diverse roles and
expertise rather than a single welldefined
field or domain

10. Activity 2:To know the
adaptations and job of sex cells.
• What do you
think you will
learn about in
todays lesson?
1._______
2._______
3._______

11. To know the adaptations and job
of sex cells.
• All: State some basic features of sex cells
and outline how fertilisation takes place.
• Most: Describe adaptations of sex cells
and how fertilisation happens in humans.
• Some: Relate the structure of sex cells to
their function and explain the process of
fertilisation in detail.

12. To know the adaptations and job
of sex cells.
• Draw the male and female sex cells
and label them.
• What do you already know about them?
• Where are they made?
• What special features do they have?
On mini
whiteboards!

13. Sex cells - Sperm
In males the sex cells are called sperm.
Sperm are produced in sex organs called testes.
To know the adaptations and job
of sex cells.

14. Sex cells - Eggs
In females the sex cells are called eggs.
Eggs are produced in sex organs called ovaries.
Nucleus
containing
chromosomes
cytoplasm
membrane
jelly coat
An egg is so big that this is how
big a sperm looks next to it.
The egg is 30 times bigger!
To know the adaptations and job
of sex cells.

15. 1. Sperm
2. Egg
Gametes (sex cells)
nucleus, cell membrane, cytoplasm, protective layer
nucleus, cell membrane, tail, head, middle section

16. Sperm or Egg?To know the adaptations and job of sex cells.

17. To know the adaptations and job
of sex cells.
• What is
FERTILISATIO
N?

18. Fertilisation and Implantation
To know the adaptations and job of sex cells.

19. To know the adaptations and
job of sex cells.
• All: State some basic
features of sex cells and
outline how fertilisation
takes place.
• Most: Describe
adaptations of sex cells
and how fertilisation
happens in humans.
• Some: Relate the
structure of sex cells to
their function and explain
the process of
fertilisation in detail.
Situations vacant-
• Write a job description
either for an egg or
sperm.
• Read to your partner.
• Can they guess the sex
cell?
• How would they improve
it?

20. • Success criteria- Situations vacant-
• Write a job
description either for
an egg or sperm.
• Read to your partner.
• Can they guess the sex
cell?
• How would they
improve it?
To know the adaptations and job
of sex cells.

21. To know the adaptations and job
of sex cells.
Sperm
cells
Egg cells
have
are
join
a tail
a large
cytoplasm
produced
with an
egg cell
because
in
to make
it is used as a energy source
for the fertilised egg to
develop
the ovaries
a fertilised egg cell.
this develops into the
embryo.
they need to swim up into
the uterus.

22. egg tube / fallopian tube
gland
sperm
egg
hormone
ovary
testis menstruation
ovulation
cervix
scrotum
penis
puberty
vagina
womb / uterus
fertilisation
labour
amniotic fluid
umbilical cord
placenta
Choose 6 words and write them in your bingo card

23. Characteristics of authentic
activities
Aunthetics used
3. Authentic activities comprise complex tasks to be investigated
by students over a sustained period of time.
Activities are completed in days, weeks, and months rather than
minutes or hours, requiring significant investment of time and
intellectual resources.
4. Authentic activities provide the opportunity for students to examine
the task from different perspectives, using a variety of resources.
The task affords learners the opportunity to examine the
problem from a variety of theoretical and practical perspectives, rather
than a single perspective that learners must
imitate to be successful. The use of a variety of resources
rather than a limited number of preselected references requires students
to detect relevant from irrelevant information

24. Activity 3:Pregnancy: The developing baby
Use the activity to label the foetus
Learning objective:
To be able to describe how the baby survives during pregnancy.
To learn how the developing baby survives
Task 1:

25. Continue…
Task 2:
What does each part do?
Use the website to complete these sentences:
The foetus is__________________________________________
The umbilical cord connects_____________________________
The amniotic fluid_____________________________________
The placenta is________________________________________
_______________________________________________________________
_________________________________________

26. Continues…
Task 3:
What crosses the placenta?
The placenta is like a filter. It stops some things from crossing from the
mum to the baby (for example blood). Luckily it allows some things to cross
over!
Do you know what crosses over and which way?
MOTHER BABY
Placenta
Carbon Dioxide Water Oxygen Food
Alcohol Blood Urine (wee)

27. Continues…
Final Task:
Can you make a model of a developing foetus? Use some of the modelling
materials to make your model foetus (Remember a model doesn’t have to
look exactly the same as the real thing).
Some things you could use:
Bag Balloon Pipe Sponge Bottle Newspaper
Make sure you can explain how your model is like a developing foetus! Can
you describe what each part does (L4b) can you explain where the placenta
is and what happens across it? (L5).
FINAL THOUGHT: Do you think alcohol can pass to the baby through the
placenta? Why? Why not?

28. Characteristics of authentic activities.
1. Authentic activities have real-world relevance.
Activities match as nearly as possible the real-world tasks
of professionals in practice rather than decontextualized or
classroom-based tasks.
6. Authentic activities provide the opportunity to reflect.
Activities need to enable learners to make choices and reflect
on their learning both individually and socially.