Multiple Choice
Which term best describes different forms of the same 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 terms describes a change in allelic frequency due to random disappearance of genes in a small population?
A
Natural Selection
B
Allele creation through mutation
C
Gene Flow
D
Genetic Drift
E
Non-random mating
Verified step by step guidance1
Understand the concept of allelic frequency, which refers to how common an allele is in a population.
Recognize that genetic drift is a mechanism of evolution that leads to changes in allelic frequencies due to random events, especially in small populations.
Differentiate genetic drift from other evolutionary mechanisms: Natural selection involves differential survival and reproduction, mutation introduces new alleles, gene flow involves the transfer of alleles between populations, and non-random mating affects allele combinations rather than frequencies.
Identify that genetic drift can lead to the random disappearance of alleles, particularly in small populations where chance events can have a larger impact.
Conclude that the term describing a change in allelic frequency due to random disappearance of genes in a small population is 'Genetic Drift'.
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