1. Lesson Starter What is fertilisation?
Where in the female body does fertilisation take place?
How does the baby get the nutrients it needs for growth?
What precautions should expectant mothers take in order to minimise risks to their babies?

2. Learning Intention
To learn about DNA

3. With a partner
Write down 5 PHYSICAL differences between you and the person next to you

4. Little Differences

5. Variation Differences between individuals of same species = VARIATION
Environmental differences
-scars
-hair cut/dye
-tattoos
Genetic differences
-eye colour
-tongue rolling
-ear lobes

6. Genetic Differences Genetic differences- DNA
Everyone’s DNA is different
Blueprint/instructions for us

7. DNA
DNA stored in chromosomes
Inside NUCLEUS
2 sets of chromosomes

8. Chromosomes Egg and sperm- 23 chromosomes each
Fuse together to give full set (46 chromosomes)
2 sets of chromosomes
Inherit characteristics from both parents
Offspring resemble parents but not identical- VARIATION

9. Inheritance (copy)
Characteristics such as hair colour, the ability to roll our tongue and shoe size are all things which we have INHERITED from our parents.
We receive 23 chromosomes from each parent (we have 46 in total).
DNA is a molecule which is stored in chromosomes; it provides the blueprint (instructions) which determine what we look like.

10. Genetic Traits: Task Draw round your hand and cut it out
On each finger, write down one of your characteristics that you have inherited from your parents

11. Genetic Trait Bingo
Using your hand print as your bingo card: listen out and mark off each genetic trait that is called.
The winner is the person who has their traits called first

12. Lesson Starter Why do we resemble our parents?
How many chromosomes do we have?
Where in the cell are chromosomes stored?
What is DNA?

13. To extract DNA from berries
Learning Intention
To extract DNA from berries

14. DNA All living things contain DNA Animals, Plants, Bacteria, Fungi
Different numbers of chromosomes per species
Humans= 46
Fruit fly= 8
Carrot 18
Horse= 64

15. Extracting DNA from fruit
Extracting the DNA
Making the extraction buffer
Add the fruit to the ziplock bag and mash
Add the extraction fluid and keep mashing
Place bag in water 60°C for 15 minutes
Filter “mush” into a beaker
Pour ICE COLD ethanol down side of beaker
Use paperclip to remove DNA strand
Using a measuring cylinder, measure 100mls of water
Add 2 g of salt and 5g of washing up liquid
Stir (gently) till the salt dissolves

16. Analysing DNA Karyotype Amnioscentisis
Size, shape, number of chromosomes
Chromosome abnormalities
eg downs syndrome, cystic fibrosis, prader-willi syndrome

17. Homework: research
Research and pick one genetically inherited illness or syndrome
Find out what causes the illness, what the symptoms are and what possible treatment there is (if any)

18. To learn about the structure of DNA
Learning Intention
To learn about the structure of DNA

19. DNA structure https://www.twig-world.com/film/what-is-dna-1049/
Double helix
Ladder
Rungs= bases
Adenine
Thymine
Guanine
Cytosine

20. Use the worksheet to create a model of DNA
DNA structure
Use the worksheet to create a model of DNA