Aphids feed on both alfalfa and clover plants. A researcher collected and reared different genotypes of aphids from separate alfalfa and clover fields. He then measured the fecundity of both aphid groups when fed on each of the two host plants. The figure summarizes the performance of aphid groups originating from alfalfa (dashed) or clover (solid). Which one or more of the following situations does the figure depict?
Show Hint
- Aphids demonstrate a genotype by environment interaction.
- Aphids from clover fields are much less genetically variable than aphids from alfalfa fields.
- Aphids from clover fields are locally adapted to their original host.
- Aphids from clover fields show high plasticity.
The Correct Option is A
Solution and Explanation
Analyzing the Interaction Effect. The performance data shows that aphids perform differently when switched between alfalfa and clover, which is indicative of a genotype by environment interaction. Each aphid genotype exhibits different levels of fecundity based on the plant type, supporting the concept that genetic traits interact differently with environmental factors.
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