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
3
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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
4

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
5

A species that has experienced a severe bottleneck event would be expected to _______.

A
be better able to adapt to changing environmental pressures
B
have few instances of inbreeding
C
be more susceptible to disease and famine
D
retain significant genetic diversity
6

The bottleneck event that decimated the bison was caused by _______.

A
overhunting
B
climate change
C
disease
D
habitat destruction
7

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
8

The Toba supervolcanic event caused a bottleneck in the human population by _______.

A
raising global temperatures
B
humans choking on volcanic ash
C
inducing an ice age
D
volcanic lava burning human villages
9

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
11

Which of the following statements is most accurate concerning the founder effect?

A
It increases genetic variation.
B
It is not an example of genetic drift.
C
It results when a small population breaks away from a larger one.
D
It only occurs amongst the Amish.
13

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

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