Those genes in all the same species could have all been designed...neither you or I have any way of knowing whether it was a mutation or designed. Which do you think is more likely?
Mutation is far more likely. A designer wouldn't put rubbish genes that don't work into 3 separate species?
So someone designed in the same mistake in the same defective protein in all three species, which just by accident happen to be the three which evolutionists claim are closest related.
Why design in a mistake in the first place? And why design in the same mistake on three independent occasions? And you're claiming this theory is scientific?