Agene with the original sequence of atgtt—tact underwent substitution mutation to form atatt—tact after a few generations. tact is a part of a muscle protein encoding region, and atgtt codes for a digestive enzyme. what will be the effect of this mutation?

the production of muscle protein will be affected.
the production of digestive enzymes will be affected.
the production of both the protein and the enzyme will be affected.
the production of neither the protein nor the enzyme will be affected.

The production of digestive enzymes will be affected.

Explanation:

Substitution mutation is a type of mutation, in which one nucleotide gets replaced with another nucleotide. In given sequence, substitution mutation has changed the sequence from ATGTT-TACT to ATATT-TACT.  

As DNA segment TACT codes for muscle protein, while DNA segment ATGTT codes for a digestive enzyme, this mutation will affect synthesis of digestive enzyme made by ATGTT segment.

This is because codon sequence of ATGTT segment has been changed due to  mutation and now this segment will form a different protein. On the other hand, there is no change in muscle protein coding segment (TACT) so production of muscle protein will not affected.

Thus, the correct answer is second option.

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