Wild type 5' 3' Č G ĠŤÁ Ć Ġ Ť Ť Á Á À G C C ATG C A ATTT 3' DNA 5' Č Ġ G GUU A A A 3' Transcribed codons Arginine Tyrosine Valine Lysine Amino acids translated Mutant Base pair addition - 5'- 3' C G ĞÁŤ Á ČĠŤŤ Á Á Á GC C TATGC A ATT! DNA 3' iil5' TIIT 5' 3' Transcribed codons CGG Arginine Isoleucine Arginine STOP Amino acids translated FIGURE 8.4 Frameshift Mutation as a Result of Nucleotide Addition The addition of a nucleotide pair (base pair) to the DNA results in a shift in the reading frame when the sequence is transcribed and translated. Deletion of a single nucleotide pair in the DNA would have a similar effect.
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.
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