This removes some cheek cells. This will break open the many hundreds of cheek cells, releasing the DNA message that each cell must carry . Strands of DNA will be seen where the two layers meet. Add excess 2M ammonia solution and a few drops of 0.1M silver nitrate to 1 mL of DNA extract. A white precipitate indicates the presence of purines.
Yellow colour indicates presence of phosphate.
Boil in water bath for 15 minutes. Green-blue colour indicates presence of deoxyribose. If the DNA from a luminescent jellyfish is inserted into the DNA plan of a mouse it could glow in the dark.