WorksheetsLesson 50: Gene Flow and Genetic Drift
Total questions: 10
Worksheet time: 6mins
The _________________ _________________ occurs when there is a reduction in population due to natural disasters, over hunting or disease.
founder effect
gene flow
bottleneck effect
genetic drift
In which of the following populations would genetic drift be most likely to cause a rapid evolution of the population?
The human population of India
A large population of Mexican free-tailed bats living in central Texas
A geographically isolated population of 5000 green tree frogs
A small group of 12 cheetahs living in Namibia
As a population recovers from reduction due to the bottleneck effect, the population will experience -
a loss of genetic dicversity.
migration.
no change to allele frequency.
genetic regulation.
Genetic drift occurs most quickly in -
small populations.
populations with large genetic variation.
populations with small genetic variation.
large populations.
What is gene flow?
The addition or removal of alleles in a population due to individuals entering or leaving one population for another
A change in allele frequencies when a new population arises from only a few individuals
A reduction in population caused by natural disasters, disease, hunting, etc.
A change in the gene pool due to chance
A widespread occurrence of disease is called a(n) ______________.
allele frequency
natural disaster
bottleneck effect
epidemic
Select all answers below that describe the founder effect.
Changes allele frequencies
Occurs when a new population arises from only a few individuals
Can result in a loss of genetic diversity
Is caused by a disaster that kills off most individuals in a population
Which of the following could not be a possible cause of the bottleneck effect?
Overhunting of northern elephant seals
A forest fire that destroys most of a population of deer
A crop that is destroyed by blight
A small group of fish that are added to a pond
What is genetic drift?
A population for which the gene frequencies do not change
A change in allele frequencies due to selection
The addition or removal of alleles in a population due to individuals entering or leaving one population for another
A change in the gene pool due to chance
A gene pool consists of (a) frequencies that can change randomly through generations due to chance.
