Introns are known to contain termination codons (UAA, UGA, or UAG), yet these codons do not interrupt the coding of a particular protein. Why? More than one termination codon is needed to stop translation. Exons are spliced out of mRNA before translation. They are not in the correct reading frame. Introns are removed from mRNA before translation.
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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Introns are known to contain termination codons (UAA, UGA, or UAG), yet these codons do not interrupt the coding of a particular protein. Why?
More than one termination codon is needed to stop translation.
Exons are spliced out of mRNA before translation.
They are not in the correct reading frame.
Introns are removed from mRNA before translation.
Eukaryotic genes contain very long base sequences, all of which do not necessarily form mature mRNA. The base sequences coding for amino acids are known as exons, intervened by stretches of non-coding DNA sequences called introns. Introns have GU at the 5' end and AG at the 3' end. The number and length of exons may vary depending on the size of the gene, alternated by stretches of DNA containing no genetic information, i.e, introns.
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