Evolution Mechanisms

What is genetic drift?

• Random changes in allele frequencies due to chance events

• The movement of alleles between populations

• The process of natural selection

• The increase of genetic diversity through mutation

Tags

NGSS.HS-LS4-2

Which of the following is an example of the bottleneck effect?

• A small group colonizing a new habitat

• A sudden reduction in population size due to a natural disaster

• The introduction of new alleles into a population

• The gradual adaptation of a species to its environment

Tags

NGSS.HS-LS4-5

What is the founder effect?

• A large population experiencing a sudden change

• A small group colonizing a new habitat with different allele frequencies

• The movement of alleles between populations

• The increase of genetic diversity through mutation

What is gene flow?

• The movement of alleles between populations

• Random changes in allele frequencies due to chance events

• The process of natural selection

• The increase of genetic diversity through mutation

How does gene flow affect genetic diversity?

• It decreases genetic diversity

• It has no effect on genetic diversity

• It increases genetic diversity

• It causes genetic drift

Tags

NGSS.HS-LS2-2

What is the definition of a mutation?

• A change in the DNA sequence.

• The process of cell division.

• The formation of new cells.

• The breakdown of proteins.

Tags

NGSS.HS-LS3-2

Which of the following is a key point about mutations?

• They decrease genetic variation within a population.

• They are always harmful.

• They can be harmful, neutral, or beneficial.

• They occur only in plants.

Tags

NGSS.HS-LS3-2

What is an example of genetic recombination?

• A plant developing a thicker waxy cuticle.

• Offspring inheriting a combination of traits from both parents.

• A bacteria evolving resistance to an antibiotic.

• A change in a gene that codes for fur color.

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

What is the effect of genetic recombination on genetic variation?

• It decreases genetic variation.

• It has no effect on genetic variation.

• It increases genetic variation within a population.

• It eliminates genetic variation.

Tags

NGSS.HS-LS3-2

Multiple Choice: Genetic drift is most impactful in:

• Large populations

• Small populations

• Stable populations

• Diverse populations