Multiple Choice
Which of the following is NOT an example of a process that directly changes allelic frequency in a population?
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21. Population Genetics
Allelic Frequency Changes
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Which of the following is an example of natural selection?
A
A neutral mutation is carried from generation to generation
B
A rabbit migrated to a new location and brought new alleles to the endogenous rabbit population
C
A mutation causes a finch to develop a stronger beak, which makes it more likely to grow, survive, and reproduce.
D
One allele becomes fixed in a population due to random genetic drift over time.
Verified step by step guidance1
Understand the concept of natural selection: Natural selection is a process where organisms better adapted to their environment tend to survive and produce more offspring. It involves differential survival and reproduction due to variations in traits.
Analyze the options given: Evaluate each scenario to determine if it involves differential survival and reproduction based on advantageous traits.
Option 1: A neutral mutation is carried from generation to generation. Neutral mutations do not affect an organism's ability to survive or reproduce, so this is not an example of natural selection.
Option 2: A rabbit migrated to a new location and brought new alleles to the endogenous rabbit population. This describes gene flow, not natural selection, as it involves the movement of alleles between populations.
Option 3: A mutation causes a finch to develop a stronger beak, which makes it more likely to grow, survive, and reproduce. This is an example of natural selection, as the mutation provides a survival advantage, leading to increased reproduction.
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