Refer to the Figure Showing Hox Gene Expression in the Mouse

question 33

Multiple Choice

Refer to the figure showing Hox gene expression in the mouse embryo. From this figure you can conclude that

• A) only one Hoxb gene is expressed in the anterior region of the embryo.
• B) more Hoxb genes are expressed in the posterior region of the embryo than in the anterior region.
• C) Hoxb9 gene is only expressed in the posterior region of the spinal cord.
• D) Hoxb4 gene is expressed in a more posterior region than Hoxb2.
• E) Hoxb2 expression is higher in the spinal cord than the hindbrain.

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Definitions:

Ventromedial Hypothalamus

A region of the brain involved in regulating hunger, fullness, and the body's energy balance.

Lateral Hypothalamus

A region of the brain that plays a key role in controlling hunger and thirst by regulating appetite and energy balance.

Hypothalamus

A small region at the base of the brain responsible for hormone production, regulation of body temperature, and maintaining daily physiological cycles.

Gastrocnemius

A major muscle in the back part of the lower leg, often referred to as the calf muscle, crucial for walking, jumping, and running.