Multiple Choice
How did Bernard Kettlewell determine whether certain moths survived longer than others during his studies on natural selection in peppered moths?
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1. Introduction to Biology
Natural Selection and Evolution
Multiple Choice
What is most likely to happen to a population of mice that becomes isolated on an island?
A
The population will rapidly increase genetic diversity by interbreeding with other species.
B
The population will remain genetically identical to the mainland population indefinitely.
C
The population will immediately go extinct due to lack of resources.
D
The population may evolve unique traits due to genetic drift and natural selection.
Verified step by step guidance1
Understand the concept of genetic drift: Genetic drift refers to random changes in allele frequencies within a population, especially in small populations. When a population becomes isolated, genetic drift can lead to unique traits over time.
Understand the concept of natural selection: Natural selection is the process by which individuals with traits better suited to their environment are more likely to survive and reproduce. On an isolated island, environmental pressures may differ from the mainland, leading to the evolution of unique traits.
Consider the role of isolation: Isolation prevents gene flow between the island population and the mainland population. This lack of gene flow allows the island population to diverge genetically over time.
Evaluate the incorrect options: Interbreeding with other species is unlikely unless closely related species are present on the island. Remaining genetically identical indefinitely is improbable due to genetic drift and natural selection. Immediate extinction is unlikely unless the island lacks essential resources.
Conclude that the population may evolve unique traits: The combination of genetic drift, natural selection, and isolation can lead to the development of unique traits in the island population over time.
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