Multiple Choice
Which statement accurately describes genetic drift?
584
views
22. Evolution of Populations
Genetic Drift
Multiple Choice
In which of the following situations would genetic drift most likely cause evolution?
A
A large population of animals with high genetic diversity
B
A population undergoing natural selection due to environmental changes
C
A population with frequent gene flow from neighboring populations
D
A small population of animals isolated on an island
Verified step by step guidance1
Understand the concept of genetic drift: Genetic drift is a mechanism of evolution that refers to random changes in the frequency of alleles (gene variants) in a population. It is more pronounced in small populations because random events can have a larger impact on the population's genetic makeup.
Consider the size of the population: Genetic drift has a more significant effect in small populations. In large populations, the impact of random events is diluted, and allele frequencies are more stable.
Evaluate the genetic diversity: High genetic diversity in a large population can buffer against the effects of genetic drift, as there are many alleles present, reducing the impact of random changes.
Assess the role of natural selection: While natural selection is a key driver of evolution, it is a different mechanism than genetic drift. Natural selection involves differential survival and reproduction based on advantageous traits, whereas genetic drift is random.
Consider the impact of gene flow: Frequent gene flow from neighboring populations introduces new alleles, which can counteract the effects of genetic drift by increasing genetic diversity and stabilizing allele frequencies.
Related Videos
Related Practice
