Population Genetics Answers

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Which of the following is not a potential result of a bottleneck event?

A
an increase in potential mates
B
a decrease in genetic diversity
C
an increase in inbreeding
D
an increased chance of extinction
2
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Bottleneck events are always caused by the death of most of a species’ population.

A
T
B
F
3

The study of island biogeography is best said to be based on _______.

A
founder populations
B
genetic drift
C
genetic diversity
D
offspring exhibiting parental genes
4

R-organisms reproduce at a very high rate. Knowing this, why don’t they usually reach their carrying capacity?

A
They live in environments with many predators that feed on them.
B
They are regularly killed off by disease and/or drought.
C
Their life span is too short.
D
a and b only
5

The bottleneck event that the cheetah went through in the last ice age ultimately resulted in a stronger, more robust species.

A
T
B
F
6

Which respresents the common conditions of all three of the following: genetic drift, the founder principle, and the bottleneck effect?

A
occurs in small populations when one genetic trait becomes more common in a population purely by chance
B
occurs in small populations and results in a decrease in genetic diversity and/or an increase in the occurrence of specific genetic traits
C
when a small group of organisms only reproduce with each other to create a larger population of organisms
D
when the majority of a population is killed off and there are only a few remaining organisms left to rebuild the population
7

The disproportionately high appearance of polydactylism among the Amish suggests that _______.

A
it is a common mutation
B
it is a common birth defect in Pennsylvania
C
it was overrepresented in the gene pool of the original Amish settlers
D
humans are prone to this birth defect
8

Conservation efforts have preserved most of the bison’s original genetic diversity.

A
T
B
F
9

Genetic drift is best described as the redistribution of the frequency of gene occurrence in a(n) _______.

A
population
B
organism
C
ecosystem
D
disaster
10

The founder effect is an example of _______.

A
the enhancement of recessive traits
B
genetic drift
C
human reproduction
D
the enhancement of dominant traits

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