Introduction to DNA for Key Stage 2 (KS2)
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An introduction to DNA for kids aged about 8, as I originally aimed it at Year 3 (Key Stage 2). This ties to two short practicals: making sweetie DNA and drawing their own chalk masterpiece of "fluorescent bacteria"
![How many???
Around 2.5 billion cells in
one of your hands, but they
are tiny. If every cell in
your hand was the size of a
grain of sand, your hand
would be the size of a bus!
Each cell has its own job.
But how does each cell know
what job to do?
[5,6]](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
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Introduction to DNA for Key Stage 2 (KS2)
- 2. How many??? Around 2.5 billion cells in one of your hands, but they are tiny. If every cell in your hand was the size of a grain of sand, your hand would be the size of a bus! Each cell has its own job. But how does each cell know what job to do? [5,6]
- 3. What is DNA for? DNA acts like a recipe, telling our bodies how to develop and how to work. There are about 1.5 gigabytes of information in each cell[2]. [2]
- 4. What does it look like? http://www.wehi.edu.au/wehi-tv/molecular-visualisations-dna https://www.youtube.com/watch?v=QD1TjeszTHQ
- 5. There must be 1000s of recipes!! Each piece of information / recipe is carried on a different section of the DNA. These sections are called genes[1]. [3]
- 6. Building sweetie DNA: 6 Billion* pairs??!! [2,4]* Diploid number
- 7. Your Recipe is…? A == T C == G
- 8. Jellyfish Glow You can get fluorescent yellows and greens from jellyfish. You can get fluorescent reds from some corals. [8]
- 9. What Bacteria Painting Would you Do? [7]
- 10. Citations [1] http://kids.britannica.com/elementary/article-390730/DNA Accessed 2 March 2017. [2] https://pdb101.rcsb.org/motm/23 Accessed 2 March 2017. [3] https://www.pets4homes.co.uk/pet-advice/is-it-true-bengal-cats-shed-less-than-other-cats.html Accessed 2 March 2017. [4] http://science.howstuffworks.com/life/cellular-microscopic/cell6.htm Accessed 2 March 2017. [5] http://www.cell.com/pictureshow/skin Accessed 2 March 2017. [6] http://www.cell.com/pictureshow/viruses Accessed 2 March 2017. [7] http://tsienlab.ucsd.edu/HTML/Images/IMAGE%20-%20PLATE%20-%20Beach.jpg Accessed 2 March 2017. [8] By Brocken Inaglory - Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=2141765 Accessed 2 March 2017.
Editor's Notes
- Genes store the information that makes each one of us different. Eye color, shoe size, hair color…Sometimes, there can be a change in a gene that is “good”: that allows a cat to run faster, or a dog to smell better. Sometimes that change can cause problems: some diseases are caused by mistakes in genes.