Quote Originally Posted by Pythonfriend View Post
*puts on philosphers hat*

actually its not proven at all. lets say, 20 years from now, some scientist figures out that all bananas have a certain proteine in their blood, that coral glows dont have. or 10 years from now, some kind of disease comes along, some BP superbug, and coral glows turn out to be resistent, but not bananas. you cannot prove without a doubt that something like this will never happen, you just dont know. yes its unlikely, but its not impossible. and something like that would be part of the phenotype, even if they still look the same.

the hypothesis that they are the same morph can be disproven, its falsifiable. but the hypothesis works, and as long as its not disproven, its the best one. proving stuff is for mathematicians.

*puts philosophers hat aside*
phenotype - noun
BIOLOGY1.
the set of observable characteristics of an individual resulting from the interaction of its genotype with the environment.

Blood proteins and immune responses do not fell under the definition of phenotype, you cannot see them. You are referring to genotype.