This is the "universal" genetic code used in translation of RNA to protein. There are alternate codon useages in Mitochondria and certain other plastids, but by and large this holds true for all prokaryotes and eukaryotes. This contains all the 3 letter and 1 letter codes for the amino acid (go there for explanation of what these represent) that correspond to each codon. It should also be noted that these are listed how they appear in DNA. In RNA, Uracil replaces thymidine.

TTT Phe F
TTC Phe F
TTA Leu L
TTG Leu L

TCT Ser S
TCC Ser S
TCA Ser S
TCG Ser S

TAT Tyr Y
TAC Tyr Y
TAA STOP
TAG STOP

TGT Cys C
TGC Cys C
TGA STOP
TGG Trp W

CTT Leu L
CTC Leu L
CTA Leu L
CTG Leu L

CCT Pro P
CCC Pro P
CCA Pro P
CCG Pro P

CAT His H
CAC His H
CAA Gln Q
CAG Gln Q

CGT Arg R
CGC Arg R
CGA Arg R
CGG Arg R

ATT Ile I
ATC Ile I
ATA Ile I
ATG START/Met M

ACT Thr T
ACC Thr T
ACA Thr T
ACG Thr T

AAT Asn N
AAC Asn N
AAA Lys K
AAG Lys K

AGT Ser S
AGC Ser S
AGA Arg R
AGG Arg R

GTT Val V
GTC Val V
GTA Val V
GTG Val V

GCT Ala A
GCC Ala A
GCA Ala A
GCG Ala A

GAT Asp D
GAC Asp D
GAA Glu E
GAG Glu E

GGT Gly G
GGC Gly G
GGA Gly G
GGG Gly G