Cysteine
Alanine
Glycine
Proline
Threonine
Serine
Tyrosine
Amino acid
Isoleucine
Leucine
Valine
Phenylalanine
mRNA codons that encode for the amino acid

AUU, AUC, AUA - Isoleucine

CUU, CUC, CUA, CUG, UUA, UUG - Leucine

GUU, GUC, GUA, GUG - Valine

UUU, UUC - Phenylalanine

AUG - Methionine (also the start codon)

UGU, UGC - Cysteine

GCU, GCC, GCA, GCG - Alanine

GGU, GGC, GGA, GGG - Glycine

CCU, CCC, CCA, CCG - Proline

ACU, ACC, ACA, ACG - Threonine

UCU, UCC, UCA, UCG, AGU, AGC - Serine

UAU, UAC - Tyrosine

UGG - Tryptophan

CAA, CAG - Glutamine

AAU, AAC - Asparagine

CAU, CAC - Histidine

GAA, GAG - Glutamic acid

GAU, GAC - Aspartic acid

AAA, AAG - Lysine

CGU, CGC, CGA, CGG, AGA, AGG - Arginine

UAA, UAG, UGA - Stop codons

17. How might a gene mutation be silent, with no observable effect on a cell or an organism?

A. Many proteins are superfluous to the function of a cell. A gene mutation in a gene that encodes an unnecessary protein would have no observable effect on the cell or the organism.
B. Many amino acids are encoded by multiple codons. A gene mutation that encodes the same amino acid would have no observable effect on the cell or the organism.
C. Codons are complementary to anticodons in tRNA. A gene mutation that changes a codon to its anticodon would have no observable effect on the cell or the organism.
D. Several codons are stop codons. A gene mutation that inserts a stop codon when only a few amino acids remain in the peptide sequence would have no observable effect on the cell or the organism.



Answer :

Final answer:

Silent mutations are caused by gene mutations that change codons to encode the same amino acid, having no impact on the protein product.


Explanation:

Silent mutations occur when a gene mutation changes a codon to another codon that encodes the same amino acid. This is due to the redundancy in the genetic code where most amino acids have multiple codons. As a result, these mutations have no effect on the protein product. Detecting silent mutations typically requires sequencing the gene or its mRNA.


Learn more about Silent mutations here:

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