Yes, all mutations change the resulting protein. No, the amino acid sequence has not been changed. Yes, the 5th amino acid in the sequence has changed. No, mutations in the DNA do not affect the mRNA sequence.
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.
Deoxyribonucleic acid (DNA) is the material that carries inheritable information to the succeeding generations. It is converted to messenger ribonucleic acid (mRNA) and then into proteins by transcription and translation respectively.
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