Sunday, 22 May 2005

This presentation is part of: High School Education Posters

The Effects of Different Concentrations of Pesticides on Onion DNA

Payal A. Patel, John F. Kennedy Memorial High School, Iselin, NJ

Humans are susceptible to numerous diseases and disorders that can be traced back to DNA mutations. Many of these mutations can be caused unintentionally by humans themselves. One way to mutate DNA is through indirect contact. There are also numerous ways in which indirect contact can take place. Scientists have been studying food that humans eat in their structure and health. A factor that must be taken into view is the heavy use of pesticides on crops. Crops must be protected from insects and bacteria and therefore constantly have pesticides applied to them. These chemicals can cause damage to the DNA (mutations). The purpose of my experiment was to observe the changes (if any) to onion DNA that had been exposed to different amounts of pesticides. My experiment consisted of applying pesticides to two sets of variables each containing ten onion bulbs. My results showed that the control DNA was white string like and smooth, while the onion DNA from the bulbs exposed to pesticides were clumpy and yellow in color. This showed a distinct change in the DNA structure of the onion bulb. For future research, I would like to use specific pesticides, some of which that are used on real crops. Finally, I would like to make the results more accurate by broadening my variables.

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