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The good genes hypothesis holds that males develop impressive ornaments to show off:
AMetabolism and disease resistance
BTheir exact age in years
CTheir preferred nesting site
DTheir total daily food intake
Answer & Solution
Correct answer: A. Metabolism and disease resistance
1. Costly ornaments need an explanation in fitness terms.
2. The good genes hypothesis states that males develop these impressive ornaments.
3. They do so to show off their efficient metabolism or their ability to fight disease.
4. The handicap principle offers a parallel explanation.
5. In both, the trait is an honest signal of the males' quality.
_Source: OpenStax Biology 2e (CC BY 4.0), Ch 19 'The Evolution of Populations', sections 19.1-19.3_
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