This activity provides a first-hand understanding of how DNA can be isolated for further analysis, such as DNA fingerprinting.
Students also reinforce their understanding of cell structure and biological macromolecules.
If you do not have the chemicals available, you can prepare solutions that use common household supplies. Refer to the alternative kitchen version of this lab. Have a hot water bath in an accessible location so that students can incubate their onion mixtures. Have at least two blenders available in the classroom. You will need an ice chest filled with ice to cool down the mixtures after blending.