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A scientist is studying coat color in three different populations of field mice. Brown coat color is dominant to grey coat color.

Below is a data table showing the number of brown and grey mice in each of the three populations:

Coat Color in Field Mice

Brown Grey
Population X 18 2
Population Y 180 20
Population Z 54 6

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Which of the following populations is MOST likely to be subject to the bottleneck effect if a catastrophic event were to occur?


Population X.


Population Y.


Population Z.


It is impossible to tell from the information given.

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