A Parent-Offspring Regression of Singing Activity Behavior (Measured as Rate

A parent-offspring regression of singing activity behavior (measured as rate of song production) in cardinals results in a slope of 0.6 while a parent-offspring regression on aggressive behavior in lizards (measured as rate of aggressive interactions ) results in a slope of 0.2. Now imagine conducting a selection experiment on both species in which you only allow individual cardinals with the highest singing activity and only lizards with the highest aggressive behavior to mate for several generations. Describe the predicted changes in singing behavior in the selected cardinal population versus the predicted change in aggression in the selected lizard population after 10 generations.

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Both signing activity in cardinals and a...

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