Quiz 4

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Question #1

Which force of evolution is the only source of NEW genetic material?,,

A natural selection

B mutation

C genetic drift

D gene flow

Question #2

Within three generations, the frequency of attached earlobes in the Attached Earlobe village has gone down from 80% to 20%. Is this an example of micro evolution or macro evolution?

A macroevolution

B microevolution

Question #3

Imagine that a new community of people decides to set up a village nearby the Attached earlobe village. This new group has a lot of people with free-hanging earlobes. The teenagers from the Attached earlobe village think free hanging earlobes are very sexually attractive. They start holding dances and festivals so they can invite over the neighbors and meet them. Over time, people from the two villages start to interbreed and have children. 40% of the children from these matings have attached earlobes and 60% have free-hanging lobes. This is an example of which forces of evolution?

A gene flow and mutation

B gene flow and sexual selection

C mutation and sexual selection

D genetic drift and mutation

Question #4

Imagine that 200 years later, having attached earlobes starts to be associated with practicing witchcraft. The people with attached earlobes, their spouses and children decide to leave the original community and travel off on their own. They travel to a distant part of the forest and set up their own village where they are isolated from other groups. Over a few generations, they reproduce and almost all the children have attached earlobes. They become known as the “Attached Earlobe Village.” What is the force of evolution at work here?

A natural selection

B gene flow

C founder effect

D mutation

Question #5

100 years have passed since the alleles for earlobe attachment were first polled in this population. During that time, people with the attached earlobes trait became thought of as very sexually attractive. What will most likely happen to the frequency of the E allele?

A It will probably decrease

B it will probably increase

Question #6

Using the Earlobe Gene Frequency chart: In this population, which is more common, the phenotype of attached earlobes or free-hanging earlobes?

A attached earlobes

B Free-hanging earlobes

Question #7

Using the Earlobe Gene Frequency chart: What is the frequency of the e allele?

A 0%

B 100%

C 68.10%

D 31.80%

Question #8

Using the Earlobe Gene Frequency chart: What are the total number of alleles for this trait are there in the population?

A 2,200

B 1,500

C 1,100

D 3,300

Question #9

Using the Earlobe Gene Frequency chart: What is the total number of people in the breeding population?

A 1,500

B 700

C 600

D 1,100

Question #10

Native American populations do not have the B allele for blood types. This is probably because of

A gene flow

B genetic drift

C mutation

D natural selection

Question #11

Large changes in gene frequency (usually over millions of years) that result in change at the species level is an example of

A macroevolution

B microevolution

Question #12

Changes in gene frequency in a population within a few generations (such as the change in color of pepper moths or the frequency of the tongue rolling allele in a human population) is an example of

A microevolution

B macroevolution

Question #13

The slow accumulation of genetic differences over millions of years until one species transforms into two is called

A cladogenesis

B adaptive radiation

C genetic equilibrium

D Anagenesis

Question #14

The heterozygote advantage for the “S” allele is that

A the sickle type cell helps protect against malaria by killing the plasmodium

B The person with the SA genotype will become SS genotype eventually.

C If a person is heterozygous for the sickle cell trait, there is no impact on their blood cells.

D the sickle type cell makes the person with this allele feel very healthy

Question #15

What is the main thing that determines whether two creatures are members of the same species?

A if they can mate and produce viable offspring they are the same species. If they cannot mate or produce viable offspring, they are different species.

B If they interact together and live in the same area, they are always the same species.

C If two organisms have at least 97% similar DNA, they are the same species.

D If they look the same, they are always the same species.

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