Denton suggested that these data undermined the notion that fish were ancestral to frogs, which were ancestral to reptiles, which were ancestral to birds and mammals. If they were, then wouldn't the difference in cytochrome C structures be increasingly different from carp to frog, to reptile, to mammal?
Denton argued that these data contradicted the notion that fish were ancestors of frogs, who were ancestors of reptiles, which were ancestors of birds and mammals. If this were true, wouldn't the differences in cytochrome C structures be more pronounced between carp and frog, then frog and reptile, then reptile and mammal?