The allele frequency of the r allele changed during the course of the experiment - VCE - SSCE Biology - Question 24 - 2009 - Paper 1
Question 24
The allele frequency of the r allele changed during the course of the experiment.
Allele frequencies for the r allele in Generation 1 and Generation 3 are
Generatio... show full transcript
Worked Solution & Example Answer:The allele frequency of the r allele changed during the course of the experiment - VCE - SSCE Biology - Question 24 - 2009 - Paper 1
Step 1
Identify the given data
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Answer
From the question, we have allele frequencies for the r allele in two generations:
Generation 1:
A: 0.3
B: 0.8
C: 0.7
D: 0.3
Generation 3:
A: 0.8
B: 0.3
C: 0.3
D: 0.7
Step 2
Analyze the allele frequencies
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Answer
We are looking for a pair of allele frequencies where the first value corresponds to Generation 1 and the second to Generation 3. The frequency should indicate a change in the allele frequency over time.
Step 3
Compare options
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Answer
Let's examine each option:
Option A: (0.3, 0.8) - this shows an increase in frequency from generation 1 to generation 3.
Option B: (0.8, 0.3) - this shows a decrease, not consistent with the provided data that r allele frequency increased.
Option C: (0.7, 0.3) - this shows a decrease as well.
Option D: (0.3, 0.7) - this shows an increase.
Thus, options A and D indicate an increase in the r allele frequency.
Step 4
Select the correct answer
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Answer
Among the analyzed options, both A and D show an increase of the r allele over the generations. However, the marked correct answer according to the marking scheme is A: 0.3 (Generation 1) and 0.8 (Generation 3).
