You have the same genes that are involved in eye development. Therefore, we now consider it much more likely that the eye was sort of invented only once in evolution. Then the various animal phyla ...

“On the basis of our data, we propose that N-myc plays a central role in coordinating retinal proliferation with eye growth during development.” Genes in the Myc family carry out vital roles ...

Gene regulation is the process by which cells control the expression of their genes, determining when, where, and to what extent each gene is expressed. It is a fundamental mechanism that allows cells ...

For example, Himalayan rabbits carry the C gene, which is required for the development of pigments in the fur, skin, and eyes ... This temperature regulation of gene expression produces rabbits ...