From the data it is possible to conclude that
A - VCE - SSCE Biology - Question 20 - 2004 - Paper 1
Question 20
From the data it is possible to conclude that
A. the frequency of the R$^s$ allele is greater than the frequency of the R$^r$ allele in 1968.
B. many generations a... show full transcript
Worked Solution & Example Answer:From the data it is possible to conclude that
A - VCE - SSCE Biology - Question 20 - 2004 - Paper 1
Step 1
A. the frequency of the R$^s$ allele is greater than the frequency of the R$^r$ allele in 1968.
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Answer
This statement cannot be concluded from the data, as specific frequency values are not provided.
Step 2
B. many generations after the removal of DDT the R$^r$ allele would disappear from the population.
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Answer
This conclusion cannot be drawn without understanding the survival implications for the Rr allele post-DDT removal.
Step 3
C. after removal of DDT from the environment in 1968, having the R$^r$ R$^r$ genotype reduces the chance of survival.
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Answer
This statement is correct; it indicates that the Rr Rr genotype is less advantageous when DDT is removed.
Step 4
D. between 1967 and 1968 in the presence of DDT in the environment, the mosquitoes with the R$^r$ R$^s$ genotype are the most likely to survive.
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Answer
This statement is not necessarily true since the survival advantage in a DDT-rich environment may vary.
