A researcher examines genes for several proteins that are quite similar in both structure and function. He is interested in determining whether the genes form a multigene family and in working out which of the proteins arose first evolutionarily. What would be the BEST approach to take to address this question? Be careful to look for the best approach; some other approaches could also provide useful information while being less definitive.
Well, if this researcher really wants to know which protein came first evolutionarily, they should gather all the proteins around a big table and have a good old-fashioned "Who Came First" contest! They can have a dance-off, a singing competition, or maybe even a round of Rock-Paper-Scissors. The protein that wins can proudly claim the title of "First Protein Ever" and the others can just... well, keep being proteins.
