Use the Following to Answer Questions

question 10

Multiple Choice

Use the following to answer questions
The diagram below illustrates the normal expression of three different groups of genes (A, B, and C) within four different whorls of a developing flower. Normally, whorl 1 produces sepals, whorl 2 produces petals, whorl 3 produces stamens, and whorl 4 produces carpels. Furthermore, expression of class A genes inhibits class C genes, and expression of class C inhibits class A.
-What kind of mutation would produce carpels in whorls 1 and 4 and stamens in whorls 2 and 3?

• A) defective in A
• B) defective in B
• C) defective in C
• D) defective in A and B
• E) defective in B and C

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Definitions:

Conditioned Stimulus

A previously neutral stimulus that, after being paired with an unconditioned stimulus, elicits a conditioned response.

Unconditioned Stimulus

In classical conditioning, a stimulus that unconditionally—naturally and automatically—triggers a response without prior conditioning.

Unconditioned Response

In classical conditioning, the automatic and natural reaction elicited by the unconditioned stimulus.

Neutral Stimulus

A neutral stimulus is a stimulus that initially produces no specific response other than focusing attention, until it is paired with an unconditioned stimulus.