When a population is greatly reduced in size and then increases again, there is likely a reduction in genetic diversity within the population. What is this phenomenon called?

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The phenomenon where a population is greatly reduced in size and then increases again, leading to a reduction in genetic diversity within the population is called bottleneck effect. This occurs because the smaller population has a smaller gene pool, and therefore, a lower likelihood of maintaining high levels of genetic variation. As a result, when the population starts to grow again, it may experience a loss of genetic diversity due to genetic drift, resulting in reduced adaptability to changing environments.

When a Population Is Greatly Reduced in Size and Then