44. 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.