CF is caused by a deletion of 3 letters in the gene sequence. How might this deletion cause excessive mucus production?
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3 points
The 3 missing letters in the gene sequence are needed to build a protein that controls the production of mucus.
The 3 letters in the gene sequence don’t matter, at least 6 letters must be missing to affect proteins.
The gene sequence does not matter. The protein is what determines mucus production.
None of the above
