Multiple Choice
Which term best describes a version of a gene that can exist at a specific locus within a population?
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21. Population Genetics
Allelic Frequency Changes
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Which of the following is NOT an example of a process that directly changes allelic frequency in a population?
A
Random mating
B
Genetic drift
C
Natural selection
D
Mutation
Verified step by step guidance1
Step 1: Understand the concept of allelic frequency, which refers to how common an allele is in a population's gene pool. Changes in allelic frequency indicate evolution at the genetic level.
Step 2: Review each process listed to determine if it directly changes allelic frequencies: Genetic drift, Natural selection, Mutation, and Random mating.
Step 3: Recognize that Genetic drift causes random changes in allele frequencies due to chance events, especially in small populations.
Step 4: Understand that Natural selection changes allele frequencies by favoring alleles that increase survival or reproduction.
Step 5: Know that Mutation introduces new alleles into the population, directly altering allele frequencies, whereas Random mating shuffles alleles without changing their overall frequencies.
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