Location of a Cell May Be Critical in the Determination

question 109

Multiple Choice

Location of a cell may be critical in the determination of its ultimate fate during development, as in the development of vertebrate limbs. This fact arises from

• A) the unequal distribution of transcription factors.
• B) expression of organ identity genes.
• C) a gradient in the concentration of the morphogen, sonic hedgehog.
• D) a gradient in the concentration of ZPA.
• E) expression of homeotic genes.

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Definitions:

Suprasystem

A complex system formed by the interaction of a number of smaller systems, often leading to emergent behavior not present in the individual subsystems.

Acute Leukemia

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Fractured Hip

A break in the upper portion of the femur (thigh bone), typically requiring medical intervention.

Activity Status

Describes an individual's level of physical activity or engagement in daily activities.