Multiple Choice
Which term best describes an alternative form of a single gene that can be passed from generation to generation?
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21. Population Genetics
Allelic Frequency Changes
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In a population of 100 individuals, the frequency of allele A in generation 1 is 0.6. If no evolutionary forces act on the population, what will be the expected frequency of allele A in the 5th generation?
A
0.0
B
0.6
C
0.3
D
0.9
Verified step by step guidance1
Understand that the problem involves allele frequency changes over generations in a population where no evolutionary forces (such as selection, mutation, migration, or genetic drift) are acting.
Recall the Hardy-Weinberg principle, which states that allele frequencies in a large, randomly mating population remain constant from generation to generation if no evolutionary forces act on the population.
Identify the initial allele frequency of allele A in generation 1, which is given as 0.6.
Since no evolutionary forces are acting, the allele frequency will remain the same in subsequent generations, including the 5th generation.
Therefore, the expected frequency of allele A in the 5th generation will be equal to the initial frequency, which is 0.6.
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