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 the result of selection; it is a random process that can lead to changes in allele frequencies. Selection involves the differential survival and reproduction of individuals based on their traits.
Step 2
B. only occurs in large populations.
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Answer
This statement is incorrect. Genetic drift actually has a more significant impact in small populations where random events can lead to larger changes in allele frequencies.
Step 3
C. results from a sudden increase in population size.
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Answer
Genetic drift does not result from sudden increases in population size. It is more about random fluctuations in allele frequencies due to chance events.
Step 4
D. is a chance loss of an allele from a population.
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Answer
This statement correctly defines genetic drift. It refers to the random loss or fixation of alleles in a population over time, particularly affecting small populations.
