AP BIOLOGY

EVOLUTION

HARDY WEINBERG EQUILIBRIUM

 Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
If the actual alleles do not match up with the allele frequency predicted by Hardy Weinberg, what is happening?
 A mutation B migration C evolution D natural selection
Explanation:

Detailed explanation-1: -If any one of these assumptions is not met, the population will not be in Hardy-Weinberg equilibrium. Instead, it may evolve: allele frequencies may change from one generation to the next. Allele and genotype frequencies within a single generation may also fail to satisfy the Hardy-Weinberg equation.

Detailed explanation-2: -The Hardy-Weinberg Theorem deals with Mendelian genetics in the context of populations of diploid, sexually reproducing individuals. Given a set of assumptions (discussed below), this theorem states that: allele frequencies in a population will not change from generation to generation.

Detailed explanation-3: -To know if a population is in Hardy-Weinberg Equilibrium scientists have to observe at least two generations. If the allele frequencies are the same for both generations then the population is in Hardy-Weinberg Equilibrium. Example 1b: Recall: the previous generation had allele frequencies of = 0.6 and = 0.4.

Detailed explanation-4: -It states that in a gene pool the sum of all the allelic frequencies is 1. According to this principle, if the measured frequencies come out different from the expected frequencies then it depicts certain evolutionary changes.

Detailed explanation-5: -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.

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