In an Insect Species, Survival in Agricultural Fields Regularly Sprayed

question 20

Multiple Choice

In an insect species, survival in agricultural fields regularly sprayed with insecticide is determined by the genotype for a detoxification enzyme encoded by a gene with two alleles, A and D. Which of the following statements is consistent with the data? $$\begin{array} { | l | l | } \hline \text { Genotype } & \text { Relative Fitness } \\\hline \mathrm { AA } & 1.00 \\\hline \mathrm { AD } & 0.70 \\\hline \mathrm { OD } & 0.05 \\\hline\end{array}$$

• A) Directional selection will increase the frequency of the A allele at a pace determined by the intensity of natural selection.
• B) The D allele frequency will change faster as it gets less frequent.
• C) Eventually, natural selection should lead to a balanced polymorphism.
• D) This will likely lead to the frequency of the A allele being eliminated (f=0.0) and the D allele being fixed (f=1.0).
• E) Both the A and D alleles should reach stable equilibrium frequencies that are maintained in a steady state.

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Individuals or households within a country that purchase goods and services for personal use.

Protected Industry

An industry that receives government support through measures like tariffs, quotas, and subsidies to shield it from foreign competition.

Productivity Growth

An increase in the efficiency of producing goods and services, typically leading to economic growth.

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The total cost of all inputs used in the production of goods or services, including raw materials, labor, and capital. It reflects the expenditure needed to create and bring a product or service to the market.