Base in second position A UUU UCU UAU UGU Phe Tyr UCC Cys C UUC UAC UGC Ser UUA UCA UAA Stop UGA Stop A >Leu UUG UCG UAG Stop UGG Trp G CUU CCU CAU CGU His CUC CCC CAC CGC >Leu Pro Arg CỦA CCA СА CGA Gin CUG CCG CAG CG AUU ACU AAU AGU Asn Ser AUC >lle A AUA ACC AAC AGC Thr ACA AGA Lys AGG AAA Arg AUG Met/ ACG AAG start GUU GCU GAU GGU U Asp GCC GGC GUC G GUA GAC Val Ala Gly A GCA GAA GGA Glu GUG GCG GAG GGG G A FIGURE 5.17 The genetic code. The table is arranged so that users can quickly find any amino acid from the three bases of the mRNA codon (written in the 5' →3' direction). For example, to find the amino acid corre- sponding to the codon 5' AUC 3', look first in the A row, then in the U col umn, and finally in the C space, which indicates that the amino acid is lle. Base in third position (3' end) Base in first position (5' end)
Gene Interactions
When the expression of a single trait is influenced by two or more different non-allelic genes, it is termed as genetic interaction. According to Mendel's law of inheritance, each gene functions in its own way and does not depend on the function of another gene, i.e., a single gene controls each of seven characteristics considered, but the complex contribution of many different genes determine many traits of an organism.
Gene Expression
Gene expression is a process by which the instructions present in deoxyribonucleic acid (DNA) are converted into useful molecules such as proteins, and functional messenger ribonucleic (mRNA) molecules in the case of non-protein-coding genes.
Based on the information in as shown, which single-
event is more likely: Arg-to-His, or Arg-to-Ser? Explain.
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