EVOLUTION
EVOLUTION OF A POPULATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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a situation in which allele frequencies fluctuate significantly
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a situation in which alleles get passed from parents to offspring
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a situation in which allele frequencies change only a tiny bit
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a situation in which allele frequencies remain constant
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Detailed explanation-1: -When mating is random in a large population with no disruptive circumstances, the law predicts that both genotype and allele frequencies will remain constant because they are in equilibrium.
Detailed explanation-2: -Genetic equilibrium occurs when there is no evolution within the population. In other words, the frequency of alleles (variants of a gene) will be the same from one generation to another. At genetic equilibrium, the gene or allele frequencies are stable-they do not change.
Detailed explanation-3: -The condition where a gene pool is not changing in frequency across generations is a genetic equilibrium. This is because the evolutionary forces acting upon the allele are equal. As a result, the population does not evolve even after several generations.
Detailed explanation-4: -This is useful because it lets us calculate a theoretical equilibrium frequency which is defined as the point at which there is no more change in allele frequencies, i.e. when Dp = 0 which is when (pt+1) = (pt); from above: pt(1-u) + (1-p)t(v) = pt [remember, q=(1-p)].