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

question 39

Multiple Choice

Pax-6 is a gene that is involved in eye formation in many invertebrates, such as Drosophila. Pax-6 is also found 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 characteristics of this gene?

• 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.

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