Not really. A genetic defect is a precursor to evolution. If the trait doesn’t benefit the animal and isn’t passed on with reproduction there is no evolutionary process, just a dead mutant.
If this were a wild chicken, and this mutation meant that it was better at other chickens in getting food or mating, then it could pass on the mutation. If the mutation can even be passed down, that is. But if it is, then it is evolution.
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u/Lou_LL_11 29d ago
Genetic defect is just another word for evolution.