Final answer:
Using only the deduced DNA sequence is unwise because the genetic code is degenerate and there are multiple possible coding sequences for a given amino acid sequence.
Step-by-step explanation:
It is unwise to use only the deduced DNA sequence as the probe for isolating the gene encoding the protein in a DNA library because the genetic code is degenerate.
his means that multiple codons can encode the same amino acid. Therefore, there are multiple possible coding sequences for a given amino acid sequence. Using only the deduced DNA sequence would eliminate the possibility of identifying other potential coding sequences for the protein of interest.