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25 July, 02:40

The bottleneck effect occurs when A. large groups of individuals leave their home population and establish new settlements, mating only among themselves B. many members of a population die, resulting in a great loss of genetic diversity C. many members of a population reproduce causing too much genetic diversity within the population D. small groups of individuals leave their home population and establish new settlements, mating only among themselves.

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  1. 25 July, 03:00
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    B. many members of a population die, resulting in a great loss of genetic diversity

    Explanation:

    When certain environmental fluctuations such as reduced food supply or an outbreak of disease result in a sudden decrease in the population size, the population is said to be going through a bottleneck. Bottleneck reduces genetic diversity due to the loss of alleles/genes from the population. Therefore, the death of many members of a population due to some adverse environmental factors and the resultant reduction in genetic diversity represents the bottleneck effect.
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