Category Archives: mutation

Rearchers of the Harvard Medical School built a 2 feet by 4 feet (61 x 122 cm) large petri-dish to visualize the evolution of bacteria. Their experiment induces mutations in E. coli bacteria by exposing them to gradually increasing concentrations of antibiotics.

Their assembly consists of a large glass tank with a thick agar at its bottom and a thinner agar on top of it, which acts as a mobility layer, allowing the bacteria to move around in the dish. The bottom layer is divided into 9 bands, which are treated with gradually increasing concentrations of antibiotics: No antibiotics in …read more

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