WorksheetsMechanisms of Evolution
Total questions: 9
Worksheet time: 6mins
"Survival of the Fittest" refers to (a) , which causes (b) ,
What is the definition of Genetic Drift?
Random fluctuation in allele frequency.
Natural selection process.
Mutation in DNA sequence.
Gene flow between populations.
What is the definition of Nonrandom mating (inbreeding)?
Mating occurs between similar individuals.
Mating occurs randomly in a population.
Mating occurs between different species.
Mating occurs only during specific seasons.
Randi is studying a small population of butterflies on an isolated island. What effect does Genetic Drift have on genetic variation in this population?
Lowers genetic variation (small populations).
Increases genetic variation (large populations).
Has no effect on genetic variation.
Causes genetic variation to fluctuate randomly.
In a remote arctic community of polar bears, how does Genetic Drift affect the community's overall fitness?
Usually lowers population fitness as populations are less able to adapt to environmental change.
Increases genetic diversity leading to higher adaptability.
Has no effect on population fitness.
Improves population fitness by selecting advantageous traits.
What effect does Nonrandom mating (inbreeding) have on genetic variation?
Lowers genetic variation (small populations).
Increases genetic variation.
Has no effect on genetic variation.
Leads to the creation of new alleles.
Select the best answer based on the image.
Gene Flow
Genetic Drift
Match the following
Changes in genetic traits due to a chance event
Genetic Drift
Changes in genetic traits due to migration
Gene Flow
Rapid changes contrasted with long periods with little chage
Punctuated equilibrium
Long periods of time with slow changes and diversity
Gradualism
A population of squirrels on one side of the Grand Canyon change so much over a period of time that they can no longer breed with the squirrels on the other side of the Grand Canyon. This is called _________________.
Genetic Drift
Speciation
Gene Flow
Vestigial Structures
