Hello, created, and welcome to EvC.
The traits that are emerging WERE in the original population.
Interesting hypothesis. How would you design an experiment/observation campaign to test this?
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...it unfortunately does not prove that the foxes 'evolved' into dogs.
Not so unfortunate since that wasn't the purpose of the experiment.
What we have learned from this experiment is that a relatively few genetic changes can result in multiple, coordinated changes in phenotype, and that selection pressures on one trait can also affect many other traits as well.
The purpose isn't to "prove" macroevolution (that's already been proven, at least in the sense that any scientific theory is ever proven), but to elucidate details and possible pathways through which evolution can proceed.
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By the way, kudos for bringing the "domesticated fox" into EvC. I've been trying to figure out a way to bring it into the conversation ever since I discovered this little gem.
If I had a million dollars, I'd buy you a monkey.
Haven't you always wanted a monkey?
-- The Barenaked Ladies