Your right-handed TA has pressed her hands onto agar plates. There are four plates total--left hand palm, left hand top, right hand palm, right hand top. They are incubated for growth.Which one of the four plates would you expect to contain the most diverse bacteria? Why?What factors contribute to differences you might see between the plates?Which two plates would you expect to be the most similar to each other? Why?
Question
Your right-handed TA has pressed her hands onto agar plates. There are four plates total--left hand palm, left hand top, right hand palm, right hand top. They are incubated for growth.Which one of the four plates would you expect to contain the most diverse bacteria? Why?What factors contribute to differences you might see between the plates?Which two plates would you expect to be the most similar to each other? Why?
Solution
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The plate with the most diverse bacteria would likely be the right hand palm. This is because the TA is right-handed, meaning she likely uses her right hand more often to touch various objects, each of which could potentially have different types of bacteria.
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Several factors could contribute to differences between the plates. These include the types of objects the TA has touched, the cleanliness of those objects, the TA's personal hygiene habits, and the length of time since the TA last washed her hands.
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The two plates that would likely be the most similar to each other would be the two plates from the tops of the hands. This is because the tops of the hands are less likely to come into contact with as many objects as the palms, so they would likely have been exposed to fewer types of bacteria.
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