23 Questions
Which of the following factors influence allele frequencies in a population?
Natural selection and nonrandom mating
What is the Hardy-Weinberg Equation used for?
Calculating genotype frequencies in a population
What is the driving force of evolution?
Natural selection
Which of the following is true about the process of natural selection?
Traits that favor survival and reproduction are passed on to the next generation.
What is the main reason for the increase in the frequency of mutations that confer increased survival and reproductive success within a population?
Natural selection
What is the study of how genetic variations in a population change over time under the influence of systematic and random forces?
Population genetics
What is the main source of genetic variation in a population?
Mutation
Which of the following is one of the 5 conditions that must be met for Hardy-Weinberg equilibrium to occur in a population?
There is immigration or emigration.
What is the equation used to calculate the relative frequency of the different genotypes in a population according to the Hardy-Weinberg principle?
$p^2 + 2pq + q^2 = 1$
In the M-N blood type locus, what is the frequency of the LM allele in the population?
0.5395
What is the expected genotype frequency for LMLN in the M-N blood type locus?
0.4969
Which of the following scenarios is most likely to result in the maintenance of a deleterious allele in a population?
A population with a high frequency of heterozygotes
What is the effect of mutation on allele frequencies in a population?
Mutation increases the frequency of one allele and decreases the frequency of another allele
Which of the following scenarios is an example of the Founder Effect?
A small sub-population becomes isolated and non-random sampling of the original population leads to a reduction in genetic diversity
What is the effect of random genetic drift on allele frequencies in a population?
Random genetic drift can lead to the loss of alleles in a population
According to the Hardy-Weinberg equilibrium, what conditions must be met for the allele frequencies to remain unaltered in the next generation?
Random mating and no survival advantage or reproductive differences between genotypes
In a large randomly mating population, approximately 1 in 10,000 people are affected by a autosomal recessive metabolic disorder. What is the frequency of homozygous affected individuals in this population?
0.0001
In a large randomly mating population, approximately 1 in 8,900 males are affected by an X-linked recessive disease. What percentage of women in that same population would you expect to be carriers for this disease?
0.02%
In a large randomly mating European population, approximately 1 in 1,600 individuals are affected by an autosomal recessive disease. What percentage of individuals in this same population would you expect to be carriers of this disease?
5%
According to the Theory of Natural Selection, which of the following is NOT one of the four basic postulates?
Organisms tend to produce more offspring than the environment can support.
According to Darwin's observations, which of the following is NOT one of the inferences drawn from his observations?
Species change.
According to Darwin's observations, which of the following is NOT one of the key dimensions of his thought?
Populations are ever increasing, so survival NOT guaranteed.
According to the text, what is the main consequence of natural selection on the beak size and shape of the finches in the Galapagos Islands?
The beak size and shape has a positive effect on their reproductive fitness.
Test your understanding of dominant and recessive alleles with this quiz! Explore why dominant traits don't always take over a population and why recessive alleles don't become lost over time. Discover the role of selection and how it occurs at the level of the phenotype, not the genotype. Challenge yourself and enhance your knowledge of genetics!
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