Over the Course of Evolution,humans Have Obtained Four Hox Gene

question 25

Multiple Choice

Over the course of evolution,humans have obtained four Hox gene clusters due to duplication.The presence of multiple Hox gene clusters suggests what?

• A)All four clusters are active and represent the added complexity of vertebrate development.
• B)Three of the four clusters are silent and have no effect on development.
• C)Only two of the clusters are active and represent the added complexity of vertebrate development.
• D)Only one of the clusters is silent since it would result in Drosophila development not vertebrate.

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Definitions:

Neutrons

Subatomic particles found in the nucleus of an atom, with no electric charge and a mass slightly greater than that of protons.

Carbon

A chemical element with symbol C, known as the basis of all known life on Earth, capable of forming multiple compounds including carbon dioxide and organic materials.

Ca

The chemical symbol for calcium, an element with atomic number 20, essential for living organisms, particularly in cell physiology and bone formation.

Neutrons

Electrically neutral subatomic particles found in the nucleus of an atom, contributing to the atom's mass but not its charge.