Final answer:
The amino acids phenylalanine, serine, isoleucine, valine, glycine, and alanine have multiple codons each due to the genetic code's degeneracy, which are listed above. Each codon corresponds to only one amino acid, and this genetic code is universal across organisms.
Step-by-step explanation:
Here is a list of the codons for the specified amino acids:
- Phenylalanine (Phe): UUU, UUC
- Serine (Ser): UCU, UCC, UCA, UCG, AGU, AGC
- Isoleucine (Ile): AUU, AUC, AUA
- Valine (Val): GUU, GUC, GUA, GUG
- Glycine (Gly): GGU, GGC, GGA, GGG
- Alanine (Ala): GCU, GCC, GCA, GCG
Amino acids may have multiple codons due to the degeneracy of the genetic code, meaning there are more codons than amino acids. However, the code is unambiguous, as each codon specifies only one amino acid. Additionally, the genetic code is considered universal across different organisms.