In Experiments Using Artificial Selection to Change the Number of Bristles

question 17

Multiple Choice

In experiments using artificial selection to change the number of bristles in the fruit fly Drosophila melanogaster,the resulting population of flies

• A)Bristle number is likely determined by multiple genes.
• B)Some experiments used directional selection.
• C)Some experiments used disruptive selection.
• D)Large changes in bristle number took place within 35 generations.
• E)At the end of the experiment,were unable to interbreed with wild type flies.

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Definitions:

Contact Hypothesis

A theory which posits that under certain conditions, interpersonal contact is one of the most effective ways to reduce prejudice between majority and minority group members.

Operant Behavior

Behavior that operates on, or manipulates, the environment.

Respondent Behavior

Behavior that occurs as an automatic response to some stimulus, often conditioned by previous experiences.

Maladaptive Behavior

Actions or tendencies that negatively affect an individual's ability to function adequately in work, relationships, or other areas of life.