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WorksheetsBiology, Tuesday Bell Ringer, 4.24.18
Total questions: 9
Worksheet time: 7mins
Name
Class
Date
1.
What does the Hardy-Weinberg equilibrium measure?
a)
changes in allele frequencies
b)
numbers of mutations
c)
fitness of organisms
d)
genetic diversity
2.
If a population is not evolving, it is in genetic equilibrium.
a)
True
b)
False
3.
Which is a mechanism for change in allele frequency?
a)
gene flow
b)
genetic drift
c)
natural selection
d)
all answers are correct
4.
Genetic variation ____.
a)
is created by the direct action of natural selection
b)
arises in response to changes in the environment
c)
must be present in a population before natural selection can act upon the population
d)
tends to be reduced by when diploid organisms produce gametes
5.
Which of the following is not an assumption required for Hardy-Weinberg equilibrium?
a)
Random mating
b)
No mutations
c)
Population size must fluctate
d)
No selection is occuring
6.
Gene flow occurs...
a)
...when natural forces act on existing variation
b)
...when two populations mix, but do not mate
c)
...when new individuals are added to a population
d)
...when a population is split
7.
Populations do not necessarily consist of the individuals best adapted to survive and reproduce. Theoretically, the most fit individuals in a population will survive longest and reproduce the most, however chance plays a role in who survives, Reproduces, and whose offsprings survive to reproduce as well. In a population, where the allele frequency shifts by random chance, the mechanism of evolution at work is___.
a)
Natural selection
b)
Genetic drift
c)
Migration
d)
Mutation
8.
The bottleneck effect occurs when a population size is reduced for at least one generation. Undergoing a bottleneck can greatly reduce the genetic variation a population, leaving it susceptible to extinction if it is unable to adapt to climatic changes, or changes in resource or availability. Small populations are especially at risk when a bottleneck occurs, caused by the greater effect ____ can have on small populations.
a)
Migration
b)
Natural selection
c)
Genetic drift
d)
Mutation
9.
What is geographic isolation?
a)
Members of a population live together within an geographic boundary
b)
Members of a population may become isolated from one another by geographic boundaries
c)
An isolation that is geographic
d)
None of these
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