posted by Lisa .
11. You are searching for a gene that traces its ancestry to an ancient gene in fish. Evolutionarily older fish, like the coelacanth, have only one copy of this gene. More modern fish, like a three-spine stickleback, have three. Modern humans and mammals have no homologous sequence.
A. Name the gel-based assay that would allow you to see the number of copies of this gene each of your sample organisms has.