Suppose You Found Several Drosophila Mutants That Possessed Additional Legs

question 29

Multiple Choice

Suppose you found several Drosophila mutants that possessed additional legs growing out of the head segments. The probable mutation would be found in

• A) homeotic genes.
• B) gap genes.
• C) pair- rule genes.
• D) segment- polarity genes.

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Definitions:

Dorsal Raphe Nucleus

A nucleus located in the brainstem involved in the release of serotonin and implicated in the regulation of mood, sleep, and anxiety.

Learned Helplessness

An instance where a person is overwhelmed by feelings of helplessness, caused by either a distressing event or continual lack of success.

Contingency Blocking

A phenomenon in classical conditioning where a previously learned association prevents the learning of a new association.

Latent Learning

A learning process that occurs without any immediate expression of the learned behavior or association until a suitable motivation is provided.