Evolution of Populations

Genetic equilibrium in a population refers to ..

• constant allele frequencies in successive generations

• constant mutation rate in the population

• equal numbers of dominant and recessive alleles

• equal numbers of males and females

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

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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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Which of the following is an example of natural selection?

• Breeding horses, humans selecting which traits make the fastest race horses

• Giraffes with the longer necks will be most likely to survive, reproduce, and pass that trait to their offspring.

• Giraffes stretching their necks to reach leaves and passing that trait to their offspring.

• Cropping the ears of a boxer dog

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Which of the following is an example of an adaptation?

• Dog breeding, humans selecting which traits are most beneficial

• Different tortoise shell shapes, depending on the food available to them.

• Giraffes stretching their necks to reach leaves and passing that trait to their offspring.

• Cropping the ears of a boxer dog

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NGSS.HS-LS4-2

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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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If there are 50 flowers, 30 red (RR), 15 pink (Rr) and 5 white (r), what the frequency of the recessive allele?

• 5%

• 10%

• 20%

• 25%

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NGSS.HS-LS3-3

There are 3 T alleles and 7 t alleles in a population. Calculate the frequency of the recessive allele.

• 30%

• 70%

• 10%

• 4%

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Which of the following is part of Darwin's theory of evolution?

• Geographic isolation will cause speciation

• Organisms will create mutations that will all them to survive better

• The organisms that can adapt best to their environment will survive

• Natural Selection is caused by a natural disaster

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NGSS.HS-LS4-4

Which of the following is an example of natural selection?

• Dark mice can hide from predators more easily than light colored mice

• Mice compete for food, shelter and mates

• A mutation occurs to an allele causing mice to be dark, light and now grey

• Mice migrate to the other side of a mountain, causing speciation

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