Suppose Members of a True-Breeding Strain of Salamanders with Yellow

question 173

Multiple Choice

Suppose members of a true-breeding strain of salamanders with yellow stripes are crossed with a true-breeding strain with red stripes.Red and yellow are two alleles of the same gene.The resulting offspring have both yellow stripes and red stripes.Which dominance pattern is most likely?

• A) Red stripes are dominant to yellow stripes.
• B) Yellow stripes are dominant to red stripes.
• C) Red and yellow stripes exhibit incomplete dominance.
• D) Red and yellow stripes exhibit overdominance.
• E) Red and yellow stripes exhibit codominance.

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Definitions:

Temperature Regulation

The physiological and behavioral processes by which living organisms maintain their body temperature within a certain optimal range, despite external temperature changes.

Hypothalamus

A region of the brain that coordinates the autonomic nervous system and the activity of the pituitary, controlling body temperature, thirst, hunger, and other homeostatic systems, and involved in sleep and emotional activity.

Limbic System

A complex set of brain structures located on both sides of the thalamus, involved in processing emotions, motivation, and memory.

Pons

A part of the brain located in the brainstem, critical for relaying signals between the cerebrum and the cerebellum, and involved in functions such as sleep and arousal.