Natural Selection and Genetic Drift

What is natural selection?

• The process by which individuals with beneficial traits produce more offspring, leading to changes in the traits of a population over time.

• The random change in allele frequency in a population.

• The movement of individuals from one population to another.

• The process by which individuals learn to adapt to their environment.

Which scientist is most closely associated with the theory of natural selection?

• Gregor Mendel

• Charles Darwin

• Albert Einstein

• Isaac Newton

What is genetic drift?

• The intentional breeding of organisms to produce offspring with desired traits.

• The transfer of genes from one population to another.

• A mechanism of evolution that involves random changes in the frequency of alleles in a population.

• The process by which organisms better adapted to their environment tend to survive and produce more offspring.

Which of the following is an example of natural selection?

• A population of rabbits becomes white over several generations in a snowy environment.

• A sudden decrease in rabbit population due to a disease.

• Rabbits from one area moving to another area.

• Random changes in the color of rabbits without any relation to their survival.

How does genetic drift differ from natural selection?

• Genetic drift involves changes due to the environment, while natural selection involves random changes.

• Genetic drift requires human intervention, while natural selection does not.

• Genetic drift involves random changes in allele frequencies, while natural selection involves changes due to differential survival and reproduction.

• There is no difference; they are the same process.

What role does mutation play in evolution?

• Mutation eliminates harmful traits from a population.

• Mutation is the only source of new genetic variation.

• Mutation always leads to beneficial traits.

• Mutation can only occur in response to environmental changes.

Which of the following is a key principle of natural selection?

• All species can produce more offspring than the environment can support.

• Individuals in a population have identical traits.

• Traits acquired during an organism's life can be passed on to its offspring.

• Mutation is not necessary for natural selection to occur.

What is the founder effect?

• The effect of natural disasters on population genetics.

• A form of genetic drift that occurs when a new population is established by a very small number of individuals from a larger population.

• The effect of a new mutation becoming common in a population.

• The process by which a new species is created.

Which of the following best describes the bottleneck effect?

• A sudden increase in population size.

• A sudden reduction in population size due to environmental events, leading to changes in the gene pool of the population.

• The process by which a new species evolves from an existing species.

• The increase in genetic variation due to mutation.

How does gene flow differ from genetic drift?

• Gene flow involves the movement of alleles between populations, while genetic drift involves changes in allele frequencies within a population.

• Genetic drift increases genetic variation, while gene flow decreases it.

• Gene flow can only occur in large populations, while genetic drift can only occur in small populations.

• There is no difference; gene flow and genetic drift are the same process.