Which description applies to alternative mRNA splicing? 1. heritable changes in gene expression that occur without altering the DNA sequence 2. processing of exons in mRNA that results in a single gene coding for multiple proteins 3. mRNA modifications such as additions of a 5′‑cap and 3′ poly‑A tail and removal of introns 4. a gene cluster controlled by a single promoter that transcribes to a single mRNA strand 5. protein modifications such as addition of a functional group or structural changes such as folding
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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Which description applies to alternative mRNA splicing?
1. heritable changes in gene expression that occur without altering the DNA sequence
2. processing of exons in mRNA that results in a single gene coding for multiple proteins
3. mRNA modifications such as additions of a 5′‑cap and 3′ poly‑A tail and removal of introns
4. a gene cluster controlled by a single promoter that transcribes to a single mRNA strand
5. protein modifications such as addition of a functional group or structural changes such as folding
Answer 2 is correct.
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