A gene coding for a specific metabolic enzyme has two alleles.
Table 1 shows the first 5 codons of transcribed mRNA for these two alleles.
Table 1
| Allele | mRNA sequence |
|---|---|
| Allele A | ACC UUA CGU GGG UAC |
| Allele B | ACC UUA CAU GGG UAC |
Allele B contains a mutation.
Table 2 shows the codon lookup key used to translate these mRNA codons into amino acids.
Table 2
| mRNA codon | ACC | UUA | CGU | CAU | GGG | UAC |
|---|---|---|---|---|---|---|
| Amino acid | Thr | Leu | Arg | His | Gly | Tyr |
Explain how the mutation in Allele B could affect the functioning of this enzyme.
