A mutation in DNA generates a aUGA stop codon in the middle of the mRNA coding for a particular protein. A second mutation in the cell’s DNA leads to a single nucleotide change in a tRNA that allows the correct translation of the protein; that is, the second mutation “suppresses” the defect caused by the first. the altered trNA translates the UGA as tryptophan. What nucleotide change has probably occurred in the mutant tRNA molecule? What consequences would the presence of such a mutant tRNA have for the translation of the normal genes in this cell?
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.
A mutation in DNA generates a aUGA stop codon in the middle of the mRNA coding for a particular protein. A second mutation in the cell’s DNA leads to a single
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