AP Biology Population Genetics

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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The effect that is produced when an insect carries pollen grains from one population to another is called

• gene flow

• random mating

• mutation

• mutation

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In a population of 1000 dragonfly, 80% alleles are dominant. What is the frequency of recessive allele?

• 0.8

• 0.2

• 20%

• 80%

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In a population of 250 rats, calculate the gene pool for length of fur.

• 250

• 500

• 1000

• 125

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In a population of 250 rats, the recessive allele frequency of short fur is 0.25. What is the dominant allele frequency in the next generation if the population is considered to be in genetic equilibrium?

• 0.25

• 0.5

• 0.3

• 0.75

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In a rat population that is in equilibrium, the frequency of recessive white fur allele is 0.25. Calculate the frequency of the heterozygous rat.

• 0.188

• 0.5

• 0.375

• 0.75

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Which of these factors that is the main cause of change in gene pool?

• mutation occur

• migration occur

• genetic drift occur

• the population size is small

allele frequency

• the number of a certain allele present in a population

• the act of leaving one's own territory to settle permanently in another

• the exchange of genetic material between homologous chromosomes during meiosis

• the action of coming to live permanently in a new territory

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