When a Parental Generation Undergoes Stabilizing Selection, How Will the Distribution

question 33

Multiple Choice

When a parental generation undergoes stabilizing selection, how will the distribution of phenotypes in the population change between the parental generation and their progeny?

• A) Mean phenotype increases, but variability decreases.
• B) Mean phenotype stays the same, but variability decreases.
• C) Mean phenotype stays the same, but variability increases.
• D) Mean phenotype and variability both increase.

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Definitions:

Stimulus-Stimulus Learning

A type of learning where an association is formed between two stimuli, leading to a new learned response.

Two-Factor Theory

A psychological theory proposing that emotion is based on two factors: physiological arousal and cognitive label of the arousal, proposed by Stanley Schachter and Jerome E. Singer.

Negative Reinforcement

A behavioral principle where the removal of an unpleasant stimulus strengthens a behavior or increases its likelihood of being repeated.