Banana DNA Experiment

Preparation and Mashing00:00:03

Dr. Melissa Wilson Sayres introduces the experiment of extracting DNA from fruit. The process begins by mashing a banana in a plastic bag to break down the cellular structure.

Creating the Extraction Solution00:01:10

A solution of hot water and salt is prepared and mixed with the mashed banana. Dish soap is then added carefully to avoid excessive foaming, which helps break down the cell membranes.

Filtering and Extraction00:01:51

The banana mixture is filtered through a coffee filter to separate the liquid containing the DNA from the solid pulp. Patience is required as the liquid drips through.

Precipitating the DNA00:02:13

Isopropyl alcohol is carefully added to the filtered liquid. The DNA precipitates out of the solution, appearing as white, stringy strands that become visible in the alcohol layer.