Graffiti Using the coloured pen you have been given, visit as many as the posters around the room as you can and write down anything you know about the key terms or diagrams
End
DNA
• Lesson Learning Outcomes:
Increasing Difficulty
What is the job of DNA?
State the purpose of
DNA
Identify where DNA is
stored in a cell
Carry out a practical to extract DNA from plant
cells
What is dna?• DNA is amazing!• It can make EXACT
copies of itself• It provides
instructions for cells to make proteins
Video time!• We are going to
extract the DNA from Kiwi Fruit
• Watch the video to find out how to do it…
Match the procedure with the reason – write it in next to the correct step
How similar is your DNA to...?
• The person sitting next to you
How similar is your DNA to...?
•99.7 -99.9%
How similar is your DNA to...?
• Chimpanzee
How similar is your DNA to...?
•95%
How similar is your DNA to...?
• A banana
How similar is your DNA to...?
• 50%
Humans have human genes
Organisms differ because they have different genes.
What makes organisms different?
Gerbils have gerbil genes
Bananas have (yes, you’ve guessed it) banana genes!
Genetic information
The nucleus of living cells contain chromosomes which are made up of a string of genes.
Different genes control the development of different characteristics by issuing instructions to the cell.
Chromosomes and their genes are made of a molecule called DNA.
DNA molecules carry the code that controls what cells are made of and what they do.
DNA stands for deoxyribonucleic
acid.
Each chromosome is a very long molecule of tightly coiled DNA.
What is DNA?
The DNA moleculelooks like a
twisted ladder thisspiral shape is
called a DOUBLE HELIX
The double helix ‘ladder’ of a DNA molecule is held together by ‘rungs’ made from pairs of chemicals called bases.
DNA Bases
There are four types of bases, and they are usually identified by their initials.
A
T
CG
Base pairs hold the two strands of the DNA helix together.
It is the sequence of these bases along a DNA molecule that forms the genetic code – it’s that simple!
DNA Bases
A TC G
C GA T
reflection• Write a tweet (140 characters) to summarise
what you know about DNA• It can be your favourite fact or something
about where it is stored
DNA
Chromosome
Nucleus
Cloning
genes
Dominant
Recessive
Structural protein
Functional protein
Stem Cells
Dolly the sheep
Cytoplasm
![I J B F ? J G : Y : > : I L B J H < : G G : Y H K G H < G ......20 k n h j f b j h \ Z g g u f k b g ^ j h f h f " \ u m q _ g [ _ k i h f h s g h k l b", d h ] ^ Z \ k](https://static.cupdf.com/doc/110x72/5e5668e62add2d18227f5cad/i-j-b-f-j-g-y-i-l-b-j-h-g-g-y-h-k-g-h-g-20-k.jpg)
![I H Y K G B L ? E V G : Y : I B K D3 ПОЯСНИТЕЛЬНАЯ ЗАПИСКА I j h ] j Z f f Z i j h n _ k k b h g Z e v g h [ m q _ g b y i i j h ] j Z f f _ i h \ u r _ g b d \](https://static.cupdf.com/doc/110x72/6036e39abca90e2a2b1299bc/i-h-y-k-g-b-l-e-v-g-y-i-b-k-d-3-.jpg)
