Pax-6 Is a Gene That Is Involved in Eye Formation

question 13

Multiple Choice

Pax-6 is a gene that is involved in eye formation in many invertebrates, such as Drosophila. Pax-6 is found as well in vertebrates. A Pax-6 gene from a mouse can be expressed in a fly and the protein (PAX-6) leads to a compound fly eye. This information suggests which of the following?

• A) Pax-6 genes are identical in nucleotide sequence.
• B) PAX-6 proteins have identical amino acid sequences.
• C) Pax-6 is highly conserved and shows shared evolutionary ancestry.
• D) PAX-6 proteins are different for formation of different kinds of eyes.
• E) PAX-6 from a mouse can function in a fly, but a fly's Pax-6 gene cannot function in a mouse.

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Definitions:

Elastic

Describes a situation in economics where the demand for a product or service significantly changes in response to a price change.

Substitution Effect

The change in consumption resulting from a change in the relative prices of goods, leading consumers to substitute one good for another.

Relative Price

The price of one good or service compared to another, usually expressed as a ratio or quotient.

Substitution Effect

The change in consumption patterns due to a shift in the relative prices of goods, leading consumers to substitute one good for another.