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4 November, 00:24

When a population is split into smaller groups, why do these groups develop different traits.

A. Separating the two groups decreases the chance that the two groups will diverge.

B. Mutations that arise in one group are not passed to the other group through reproduction.

C. Traits that form in one group from evolutionary forces quickly spread through both populations.

D. Gene flow is increased in the two subgroups that are formed.

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  1. 4 November, 00:38
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    The correct option is B) Mutations that arise in one group are not passed to the other group through reproduction.

    Explanation:

    There will be higher genetic variability in a larger population as compared to a smaller population. In a smaller population, the alleles or gene flow will be lesser as compared to the larger population.

    When a population is split, conditions like genetic drift become slower. Mutations which arise in one group will be limited to that smaller group only as they cannot mate with the other population. In a larger population, mutations pass on rapidly and there are more chances of genetic drift to occur.
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