EVOLUTION
EVOLUTION OF A POPULATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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random mating
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population must be small
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population must be large
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no movement into or out of the population
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no mutations
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Detailed explanation-1: -The Hardy-Weinberg model states that a population will remain at genetic equilibrium as long as five conditions are met: (1) No change in the DNA sequence, (2) No migration, (3) A very large population size, (4) Random mating, and (5) No natural selection.
Detailed explanation-2: -The conditions to maintain the Hardy-Weinberg equilibrium are: no mutation, no gene flow, large population size, random mating, and no natural selection.
Detailed explanation-3: -So, the correct answer is ‘The population is small’
Detailed explanation-4: -Mutations can produce equilibrium states, but they will be reached very slowly through the time. The mutation process does not have major effect on the genetic structure of populations; the variation of allele frequencies is very low through the time.
Detailed explanation-5: -Therefore, any deviations from the five conditions of Hardy-Weinberg equilibrium can alter the genetic variation of a given population. Conditions that change the genetic variability of a population include mutations, natural selection, non-random mating, gene flow, and genetic drift (small population size).