What is the first step in quantifying the relative amounts of mRNA in different tissues? Would this method be useful in determining which immune system genes might be over-expressed in severe Covid cases? Why or why not?
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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What is the first step in quantifying the relative amounts of mRNA in different tissues? Would this method be useful in determining which immune system genes might be over-expressed in severe Covid cases? Why or why not?
- Could quantitative PCR, which uses a DNA-binding dye, to show how many copies of the target DNA sequence could be used to quantify the amount of mRNA in a cell? Would you expect that a
metabolically active tissue such as the liver would show more cDNA copies in such a method, compared to less metabolically active tissues such as skin cells? -
One reason that the types and amounts of mRNAs are quantified in different tissue types is to compare which genes are activated and which are inactive. It used to be thought that any gene that was transcribed was automatically translated. The discovery of RNA-degrading systems shows that the real situation in cells is more complemented. Do you believe that a larger amount of mRNA of a given type, say for alpha hemoglobin in immature red blood cells is a reliable indicator that more alpha hemoglobin protein will be made in those cells?
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