This document provides instructions for extracting DNA from onion cells through a multi-step process. It begins by having students finely chop and crush an onion in a mortar and pestle and adding it to a beaker with salt, washing up liquid, and water to break open the cell walls and membranes. The mixture is then filtered and the filtrate collected. Ethanol is slowly added to the filtrate to precipitate out any extracted DNA, appearing as a white layer between the two liquids after settling. Students then use forceps to remove strands of extracted DNA from the mixture.