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Lesson: Extract DNA from a Banana

BananasIn this lab activity, students in grades 5 through 9 use a salt/detergent mixture to make a piece of a banana water soluble. Then they add cold ethanol to precipitate a froth of white DNA from the solution. With careful technique the slender threads are wound onto a glass rod for observation of deoxyribonucleic acid, the master code or blueprint of all organisms.

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