Genetic drift
A - VCE - SSCE Biology - Question 19 - 2005 - Paper 1
Question 19
Genetic drift
A. is the result of selection.
B. only occurs in large populations.
C. results from a sudden increase in population size.
D. is a chance loss of an... show full transcript
Worked Solution & Example Answer:Genetic drift
A - VCE - SSCE Biology - Question 19 - 2005 - Paper 1
Step 1
A. is the result of selection.
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Answer
Genetic drift is not a result of selection. Instead, it is a process that occurs by chance, affecting allele frequencies independently of natural selection.
Step 2
B. only occurs in large populations.
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Answer
This statement is false. Genetic drift can occur in populations of any size, but its effects are more noticeable in small populations.
Step 3
C. results from a sudden increase in population size.
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Answer
Genetic drift does not result from increases in population size. It typically refers to changes in allele frequencies due to random sampling in populations, especially when the population size decreases.
Step 4
D. is a chance loss of an allele from a population.
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Answer
This statement is correct. Genetic drift involves random changes that can lead to the loss of alleles from a population, significantly affecting genetic diversity.
