Wild turkeys are dramatically sexually dimorphic; domesticated turkeys are less so. Suppose that wild female turkeys chose mates on the basis of expensive traits that indicate disease resistance and that artificial selection for rapid weight gain in domestic turkeys destroyed female choice.
Briefly describe the mechanism of selection in wild turkey populations. What would you predict about the evolution of disease resistance in domestic turkeys? If we observe that domestic turkeys are less resistant, does that necessarily mean that wild females had be choosing more-resistance males, or are other hypotheses equally plausible?
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