Population Genetics

Which of the following are causes of evolution?

• Mutation

• Non-Random Mating (Sexual Selection)

• Genetic Drift

• Natural Selection

• All of these.

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What is genetic drift?

• The movement of genes in/out of a population
• A small, random change in the DNA
• Any change in the allelic frequencies in a population that is due to chance
• ›The process in which humans select for or against particular features in organisms

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When has speciation occurred?

• When populations no longer look the same

• When populations no longer have the same frequency of alleles

• When populations are living in different environments

• When populations can no longer interbreed

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When a population is in Hardy-Weinberg Equilibrium.  What is not happening to the species?

• Survival
• Reproduction
• Death
• Evolution

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Imagine that a population is in Hardy-Weinberg equilibrium. A certain gene presents as two different alleles, and 49% of the population homozygous dominant. What percentage of the population is homozygous recessive?

• This is a grid-in Question,
• Answer will appear on the next slide
• Choose this one

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The total collection of genes in a population at any one time.

• population genetics

• gene pool

• gene flow

• allele frequency

The total collection of genes in a population at any one time.

• population genetics

• gene pool

• gene flow

• allele frequency

A gene pool consists of ..

• all the alleles selected by natural selection

• all the alleles present in a population

• the entire genome of a sexually reproducing organism

• the frequencies of the alleles for a gene locus within a population

Random mating is defined as

• members of a population choose to mate with individuals of a particular phenotype

• members of a population choose to mate with unrelated individuals

• members of the population mate with each other without regard to their phenotypes or genotypes

• members of a population choose to mate with closely related individuals

When a gene pool of a population changed, it means ...

• number of organims in the population changes

• organisms in the population are breeding randomly

• the population is in genetic equilibrium

• the population is undergoing evolution

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