Evolution of Populations

What is a gene pool?

• all the traits seen in a population

• all the alleles seen in a population

• all the hair colors seen in a population

• none of these

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The numbers of times an allele occurs in a gene pool, compared to the number of times other alleles for the same gene occur, explains which of the following?

• relative family members

• relative functions

• relative fractions

• relative frequency

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What are the two main sources of genetic variation in a population?

• mutation

• gene shuffling

• natural selection

• evolution

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A single-gene trait is best described as...

• a trait controlled by two or more genes.

• a trait controlled by a single gene that has two alleles.

• a trait controlled by exactly 3 alleles.

• a trait controlled by more than four genes.

A trait that is controlled by two or more genes are described as...

• polypeptide traits

• polyzygot traits

• polypocket traits

• polygenic traits

Natural selection on single-gene traits can lead to changes in __________________ and thus to evolution.

• allele dominance

• allele frequencies

• adaptations

• natural selection

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NGSS.HS-LS4-2

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What are the three ways natural selection can effect the distributions of polygenic traits?

• directional selection

• reproductive selection

• stabilizing selection

• disruptive selection

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Which type of selection is shown by this graph?

• stabilizing selection

• directional selection

• disruptive selection

• none of these

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What type of selection is being shown in this graph?

• disruptive selection

• directional selection

• stabilizing selection

• none of these

Tags

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What type of selection is being shown in this graph?

• disruptive selection

• directional selection

• stabilizing selection

• none of these

Tags

NGSS.HS-LS4-4