You discover a gene for the production of fur in mammals. You examine the gene regulation in the genomes of monkey, bear, zebrafish, wolf, and snake, and all of the genomes have an orthologous gene. What does analysis of the orthologous gene tell you about the function of the gene controlling the trait? Select all statements that apply.
A) The gene function is not limited to fur production.
B) The function of the gene is the same as the ancestral gene.
C) The gene arose through duplication and functions as part of a multi-gene family.
D) The gene did not arise from a common ancestor and therefore has different functions.
E) The gene may function in another process that is found in all of the species.