Match the phenomenon to its effect on populations. There is only one best answer

Question

Match the phenomenon to its effect on populations. There is only one best answer for each number. You may use letters more than once.

Phenomenon

_____24. population bottleneck

_____25. gene flow between two island populations

_____26. mutation

_____27. genetic drift

_____28. directional selection

Effect

a. Allele frequencies become more similar across populations

b. Generation of new alleles changes allele frequencies very slowly

c. Alleles may disappear from the population simply by chance

d. Allele frequencies do not change

e. The mean trait value decreases from one generation to another

Phenomenon

_____24. population bottleneck

_____25. gene flow between two island populations

_____26. mutation

_____27. genetic drift

_____28. directional selection

Effect

a. Allele frequencies become more similar across populations

b. Generation of new alleles changes allele frequencies very slowly

c. Alleles may disappear from the population simply by chance

d. Allele frequencies do not change

e. The mean trait value decreases from one generation to another

Explanation / Answer

Phenomenon Effect Population bottleneck c. Alleles may disappear from the population simply by chance Gene flow between two island populations a. Allele frequencies become more similar across populations Mutation b. Generation of new alleles changes allele frequencies very slowly Genetic drift c. Alleles may disappear from the population simply by chance Directional selection e. The mean trait value decreases from one generation to another

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